Percussion instrument and method for detecting an attack position of a percussion instrument

Abstract

A percussion instrument, in particular electronic percussion instrument, includes at least one main attack element having at least one main attack surface and with a position detecting unit which is at least provided to detect an attack position of the main attack surface. The position detecting unit comprises at least two position detecting elements which are arranged decentrally with respect to the main attack surface, at least when the main attack surface is viewed perpendicularly.

Claims

1. A percussion instrument, in particular an electronic percussion instrument, comprising: at least one main attack element having at least one main attack surface; a position detecting unit which detects an attack position of the main attack surface; and at least one holding unit that holds the main attack element, wherein: the position detecting unit comprises at least two position detecting elements which are arranged decentrally with respect to the main attack surface, at least when the main attack surface is viewed perpendicularly, the position detecting elements detect an oscillation at the holding unit that is correlated to the attack position, and at least one of the position detecting elements is integrated in the holding unit.

2. The percussion instrument as claimed in claim 1, wherein the position detecting elements are arranged in peripheral regions of the main attack surface which are situated at least substantially opposite each other, at least when the main attack surface is viewed perpendicularly.

3. The percussion instrument as claimed in claim 1, wherein the position detecting elements are arranged at least substantially mirror-symmetrically with respect to a mirror plane which is oriented perpendicularly to the main attack surface.

4. The percussion instrument as claimed in claim 1, wherein the position detecting elements are free of contact with the main attack surface.

5. The percussion instrument as claimed in claim 1, wherein the position detecting elements each comprise at least one piezo element, the piezo element having in an assembled state a deformation direction which is at least substantially perpendicular to the main attack surface.

6. The percussion instrument as claimed in claim 1, wherein the position detecting elements are at least substantially structurally identical.

7. The percussion instrument as claimed in claim 1, wherein at least one of the position detecting elements is arranged on an outer side of the holding unit.

8. The percussion instrument as claimed in claim 1, wherein the holding unit comprises at least one tensioning element that tensions the main attack element, at least one of the position detecting elements being arranged at the tensioning element.

9. A system comprising: at least one percussion instrument as claimed in claim 1; and at least one evaluation unit, connected to the position detecting unit, which at least determines an attack position of the main attack surface.

10. The system as claimed in claim 9, wherein the evaluation unit in determining the attack position, takes into account at least one wavelength characteristic of an oscillation, which is correlated to the attack position.

11. The system as claimed in claim 9, wherein the evaluation unit in determining the attack position, takes into account at least one runtime characteristic of an oscillation, which is correlated to the attack position.

12. The system as claimed in claim 11, wherein the evaluation unit modifies in at least one operating state an evaluation method for determining the attack position, depending on a value of the runtime characteristic.

13. A method of using a percussion instrument, in particular an electronic percussion instrument, as claimed in claim 1, the method comprising: detecting an attack position of the main attack position surface by the position detecting unit, including detecting, by the position detecting elements, the oscillation at the holding unit that is correlated to the attack position.

Description

DRAWINGS

(1) Further advantages may arise from the following description of the drawings. In the drawings exemplary embodiments of the invention are presented. The drawings, the description and the claims contain a plurality of features in combination. The person having ordinary skill in the art will purposefully also consider the features separately and will find further expedient combinations.

(2) It is shown in:

(3) FIG. 1 a percussion instrument exemplarily embodied as an electronic percussion instrument, with a position detecting unit, in a perspective view,

(4) FIG. 2 an enlarged presentation of a position detecting element of the position detecting unit,

(5) FIG. 3 a presentation of attack positions which are detectable via the position detecting unit,

(6) FIG. 4 a system with the percussion instrument of FIG. 1 and with an evaluation unit, in a schematic presentation,

(7) FIG. 5 an exemplary flow diagram for the detection of an attack position of a percussion instrument, and

(8) FIG. 6 a further exemplary embodiment of a percussion instrument, with a position detecting unit, in a perspective view.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

(9) FIG. 1 shows a percussion instrument 10a, which is embodied as an electronic percussion instrument, in a perspective view. The percussion instrument 10a is herein exemplarily embodied as an electronic drum, in the present case in particular as a small drum (“snare drum”). Alternatively, a percussion instrument could, however, also be embodied as any other percussion instrument, e.g. as a kettle drum and/or a cymbal. Moreover a percussion instrument could principally also be embodied as an acoustical percussion instrument, in particular a traditional acoustical percussion instrument.

(10) The percussion instrument 10a comprises a main attack element 12a. The main attack element 12a is implemented in single-ply fashion. Alternatively, a main attack element could also be implemented in multiple-ply, e.g. double-ply fashion. The main attack element 12a is embodied as a membrane, in particular a tensioned membrane. The main attack element 12a is made of plastics. The main attack element 12a is in the present case implemented as a batter head. The main attack element 12a is in a usual application state provided to be activated and/or attacked by a user, in particular for indirectly creating an acoustical signal.

(11) For this purpose the main attack element 12a comprises a main attack surface 14a. The main attack surface 14a corresponds to a surface of the main attack element 12a that faces a user. The main attack surface 14a is in the present case circular. Moreover the main attack surface 14a is supported in such a way that it is able to oscillate. Alternatively, however, a main attack element could also be made of any material differing from plastics. It is moreover conceivable to implement a main attack surface rectangular and/or oval.

(12) The percussion instrument 10a further comprises a holding unit 36a. The holding unit 36a is provided to hold the main attack element 12a. For this purpose the holding unit 36a comprises a base body 50a. The base body 50a forms a corpus of the percussion instrument 10a. The base body 50a is adapted to a shape and/or contour of the main attack element 12a. The base body 50a is herein embodied corresponding to the main attack surface 14a. The base body 50a is embodied as a hollow body. The base body 50a is embodied as a hollow cylinder, in particular circular cylinder, and/or as a ring, in particular as an annulus. The base body 50a is in the present case embodied as a kettle. Furthermore the base body 50a is made of metal, e.g. of steel and/or brass. In an assembled state the base body 50a contacts the main attack element 12a directly. The base body 50a is provided for supporting the main attack element 12a, in particular receiving a weight force of the main attack element 12a. Alternatively it is conceivable to embody a holding unit, in particular a base body, and a main attack element in a one-part implementation. Principally it is also conceivable to entirely dispense with a holding unit. A base body could furthermore also have a contour and/or shape of a rectangular cuboid and/or could be embodied as a full body. Moreover a base body could principally also be made of any material differing from metal, e.g. plastics, wood and/or acrylic glass.

(13) In addition to this, the holding unit 36a is provided for tensioning the main attack element 12a and in particular the main attack surface 14a. For this purpose the holding unit 36a comprises at least one tensioning element 40a, 42a, 44a. In the present case the holding unit 36a comprises at least three tensioning elements 40a, 42a, 44a, which are implemented differing. The holding unit 36a herein comprises three groups of tensioning elements 40a, 42a, 44a.

(14) A first group of the groups of tensioning elements 40a, 42a, 44a comprises exactly one first tensioning element 40a. The first tensioning element 40a is adapted to a shape and/or contour of the base body 50a and/or of the main attack element 12a. The first tensioning element 40a is herein embodied corresponding to the main attack surface 14a. The first tensioning element 40a is embodied at least substantially ring-shaped. The first tensioning element 40a is embodied as a tensioning ring. Furthermore the first tensioning element 40a is made of metal. Alternatively a first tensioning element could also be made of wood and/or plastics. The first tensioning element 40a is in an assembled state arranged on a side of the holding unit 36a that faces the main attack element 12a. The first tensioning element 40a forms a rim of the holding unit 36a. The first tensioning element 40a contacts in an assembled state the main attack element 12a directly. The first tensioning element 40a is herein provided to hold the main attack element 12a to the base body 50a and/or to press it against the base body 50a.

(15) A second group of the groups of tensioning elements 40a, 42a, 44a comprises a plurality of second tensioning elements 42a, wherein, for the sake of clarity, only one of the second tensioning elements 42a is given a reference numeral in FIG. 1. In the present case the second group of the groups of tensioning elements 40a, 42a, 44a comprises precisely six second tensioning elements 42a. Alternatively a second group of the groups of tensioning elements could also comprise any other number of second tensioning elements 42a. The second tensioning elements 42a are at least substantially structurally identical. The second tensioning elements 42a are arranged, in particular fixated, on an outer side 38a of the holding unit 36a, in particular of the base body 50a. The second tensioning elements 42a are made of metal. The second tensioning elements 42a are embodied as tensioning poppets. The second tensioning elements 42a are in the present case connected to the base body 50a at least by substance-to-substance bond. Alternatively it is conceivable to implement second tensioning elements in such a way that they are connected to a base body in a force-fit and/or form-fit manner. Second tensioning elements could also be embodied in a one-part implementation with a base body. Moreover second tensioning elements could also be made of wood and/or plastics.

(16) A third group of the groups of tensioning elements 40a, 42a, 44a comprises a plurality of third tensioning elements 44a, wherein in particular in FIG. 1 only one of the third tensioning elements 44a is given a reference numeral for the sake of clarity. In the present case the third group of the groups of tensioning elements 40a, 42a, 44a comprises exactly six third tensioning elements 44a. However, as an alternative, a third group of the groups of tensioning elements could also comprise any other number of third tensioning elements. The third tensioning elements 44a are at least substantially structurally identical. The third tensioning elements 44a are arranged on the outer side 38a of the holding unit 36a, in particular of the base body 50a. The third tensioning elements 44a are made of metal. The third tensioning elements 44a are embodied as tensioning screws. Each of the third tensioning elements 44a is herein allocated to exactly one of the second tensioning elements 42a. Moreover each of the third tensioning elements 44a is allocated to the first tensioning element 40a. The third tensioning elements 44a connect in an assembled state the first tensioning element 40a to the second tensioning elements 42a.

(17) The tensioning elements 40a, 42a, 44a are in the present case provided to act together for tensioning the main attack element 12a. The main attack element 12a can herein be tensioned via the third tensioning elements 44a, in particular manually by a user. Alternatively it is conceivable to do without at least one group of tensioning elements and/or to use tensioning elements which differ from the disclosed tensioning elements. It is also conceivable to entirely dispense with tensioning elements, in particular if a main attack element with an at least substantially dimensionally stable main attack surface is used.

(18) The percussion instrument 10a further comprises a position detecting unit 16a. The position detecting unit 16a is provided to detect, in an attack process of the main attack surface 14a, an attack position 18a, 20a of the main attack surface 14a. The position detecting unit 16a is moreover provided to detect rim attacks on the edge of the holding unit 36a.

(19) For this purpose the position detecting unit 16a comprises at least two position detecting elements 22a, 24a. In the present case the position detecting unit 16a comprises exactly two position detecting elements 22a, 24a. The position detecting elements 22a, 24a are embodied extra with respect to each other. The position detecting elements 22a, 24a are embodied separate from each other. The position detecting elements 22a, 24a are herein free of shared structural components, in particular of a shared housing. The position detecting elements 22a, 24a are arranged spaced apart from each other.

(20) When the main attack surface 14a is viewed perpendicularly, the position detecting elements 22a, 24a are arranged decentrally with respect to the main attack surface 14a. The position detecting elements 22a, 24a are herein respectively arranged in a peripheral region 26a, 28a of the main attack surface 14a, in the present case in particular directly opposite peripheral regions 26a, 28a of the main attack surface 14a. The position detecting elements 22a, 24a are arranged mirror-symmetrically with respect to a mirror plane 30a which extends through the center, in particular the geometric center, of the main attack surface 14a and is oriented perpendicularly to the main attack surface 14a.

(21) In the present case the position detecting elements 22a, 24a are arranged on the holding unit 36a. The position detecting elements 22a, 24a are thus arranged spaced apart from the main attack element 12a and/or the main attack surface 14a. The position detecting elements 22a, 24a are herein continuously free of a contact with the main attack surface 14a. Furthermore the position detecting elements 22a, 24a are at least substantially structurally identical. Alternatively it is conceivable to implement position detecting elements differing from each other. Beyond this, a position detecting unit could also comprise at least three position detecting elements, in particular for the detection of an attack position via triangulation, and/or at least four position detecting elements, which could in particular be arranged in four peripheral regions of a main attack surface respectively including an angle range of 90° with each other. Beyond this it is conceivable that a position detecting unit comprises precisely one position detecting element for each detectable attack position. Additionally the position detecting unit could principally also comprise at least one position detecting element which is arranged centrally with respect to the main attack surface, at least when the main attack surface is viewed perpendicularly.

(22) In the following a first position detecting element 22a of the position detecting elements 22a, 24a is described in detail referring to FIG. 2 wherein, in particular due to the at least substantially structurally identical implementation of the position detecting elements 22a, 24a, the following description may be also applied to the other position detecting element 22a, 24a, in particular a second position detecting element 24a of the position detecting elements 22a, 24a.

(23) The first position detecting element 22a is in the present case embodied as a piezo electric pick-off. Herein the first position detecting element 22a comprises at least one piezo element 32a. In the present case the first position detecting element 22a comprises exactly one piezo element 32a. The piezo element 32a is embodied plate-shaped. The piezo element 32a is herein implemented as a piezo platelet. The piezo element 32a is herein arranged in such a way that a deformation direction 34a of the piezo element 32a is in the assembled state at least substantially perpendicular to the main attack surface 14a.

(24) The first position detecting element 22a is moreover arranged on the outer side 38a of the holding unit 36a, in particular of the base body 50a. The first position detecting element 22a is arranged at one of the tensioning elements 40a, 42a, 44a. In the present case the first position detecting element 22a is arranged at one of the second tensioning elements 42a, which are in particular embodied as tensioning poppets. In the present case the first position detecting element 22a is arranged on a side of the second tensioning element 42a that faces away from the main attack surface 14a. The first position detecting element 22a is in the present case connected to the second tensioning element 42a at least by substance-to-substance bond. Alternatively it is conceivable to connect a position detecting element to a tensioning element in a force-fit and/or form-fit manner and/or to arrange it at another point of a holding unit, in particular of a base body of the holding unit, e.g. on a side of the holding unit, in particular of the base body, that faces towards and/or away from a main attack surface. Furthermore a position detecting element could principally also be embodied in a one-part implementation with a holding unit, in particular with a tensioning element and/or a base body. Beyond this a position detecting element could also comprise several piezo elements and/or could be implemented as an optical position detecting element, e.g. as a laser sensor and/or light barrier, and/or as an acoustical position detecting element, e.g. as a microphone. It is additionally conceivable to cover a position detecting element with a cover blind.

(25) In the present case the position detecting unit 16a is provided, in particular via the position detecting elements 22a, 24a, for detecting at least forty-nine different attack positions 18a, 20a of the main attack surface 14a. In FIG. 3 the attack positions 18a, 20a are herein depicted as intersection points of radially outwards running lines and circle lines, wherein—in particular for the sake of better overview—only two of the attack positions 18a, 20a are provided with reference numerals.

(26) The position detecting elements 22a, 24a are provided to act together for detecting the attack positions 18a, 20a of the main attack surface 14a in an attack process of the main attack element 12a, in particular of the main attack surface 14a. Herein the position detecting elements 22a, 24a are respectively provided for detecting in an attack process of the main attack element 12a, in particular of the main attack surface 14a, an oscillation that is correlated with the attack position 18a, 20a, in the present case in particular at the holding unit 36a. The position detecting elements 22a, 24a are moreover provided to supply an evaluation signal, in particular an electric evaluation signal, that is correlated with the oscillation.

(27) FIG. 4 shows a system 46a with the percussion instrument 10a and an evaluation unit 48a for detecting an attack position 18a, 20a of the main attack surface 14a. The evaluation unit 48a is embodied extra and/or separate from the percussion instrument 10a. Alternatively it is however also conceivable to integrate an evaluation unit in a percussion instrument, advantageously in a holding unit and particularly preferably in a base body of the holding unit. The evaluation unit 48a comprises a connection to the percussion instrument 10a, in the present case in particular to each of the position detecting elements 22a, 24a.

(28) The evaluation unit 48a is furthermore implemented as an electronics unit. The evaluation unit 48a comprises evaluation electronics (not shown) for detecting, processing and/or interpreting the evaluation signal, which has in particular been supplied by the position detecting elements 22a, 24a. The evaluation unit 48a further comprises a connection to a sound generator 52a. In the present case the evaluation unit 48a is in particular integrated in the sound generator 52a. The sound generator 52a is provided for generating different acoustical signals depending on different attack positions 18a, 20a. Alternatively, however, a sound generator could also be dispensed with. In this case the evaluation unit could, for example, be connected to an illumination unit, which could in particular be provided for generating different optical signals depending on the different attack positions. The evaluation unit could also be connected to a tuning device, which could in particular be provided for generating different optical signals depending on the different attack positions, as a result of which advantageously a tuning of the percussion instrument and/or a tensioning of a main attack element is optimizable.

(29) In the present case the evaluation unit 48a is provided for taking into account at least one wavelength characteristic of the oscillation detected by the position detecting elements 22a, 24a for determining the attack position 18a, 20a. In the present case the evaluation unit 48a is provided for taking into account three different wavelength characteristics.

(30) A first wavelength characteristic of the wavelength characteristics corresponds to a standardized time length of a first half-wave of the oscillation that has been captured and/or detected via the first position detecting element 22a. A standardization is herein effected on the basis of a position of the first position detecting element 22a.

(31) A second wavelength characteristic of the wavelength characteristics corresponds to a standardized time length of a second half-wave of the oscillation that has been captured and/or detected via the second position detecting element 24a. A standardization is herein effected on the basis of a position of the second position detecting element 24a.

(32) A third wavelength characteristic of the wavelength characteristics corresponds to a mean value of the first half-wave and the second half-wave of the oscillation.

(33) On the basis of the wavelength characteristics, in particular of a time length of the first half-wave and the second half-wave, the evaluation unit 48a is also able to distinguish between attacks of the main attack surface 14a and rim attacks of the rim of the holding unit 36a. Principally the evaluation unit could also be provided for taking into account a differing number of wavelength characteristics, e.g. precisely one wavelength characteristic, advantageously a third wavelength characteristic and/or two wavelength characteristics, advantageously a first wavelength characteristic and a second wavelength characteristic.

(34) Moreover the evaluation unit 48a is provided for taking into account, for determining the attack position 18a, 20a, at least one runtime characteristic of the oscillation that is correlated to the attack position 18a, 20a and has been detected by the position detecting elements 22a, 24a. In the present case the evaluation unit 48a is provided for taking into account precisely one runtime characteristic.

(35) The runtime characteristic herein corresponds to a runtime difference, in particular a time period, between a capturing and/or detection of the oscillation via the first position detecting element 22a and a capturing and/or detection of the oscillation via the second position detecting element 24a.

(36) On the basis of the runtime characteristics, in particular the runtime difference, the evaluation unit 48a is herein advantageously able to distinguish between an attack position 18a in a peripheral region of the main attack surface 14a and an attack position 20a in a central region of the main attack surface 14a. Principally an evaluation unit could also be provided for taking into account a differing number of runtime characteristics, e.g. two and/or three runtime characteristics, in particular when more than two position detecting elements are used. Beyond this an evaluation unit could, additionally or alternatively, be provided for taking into account at least one amplitude characteristic and/or amplitude correlated to the attack position of an oscillation, in particular an oscillation detected by position detecting elements.

(37) The evaluation unit 48a is further provided for modifying and/or changing, in at least one operating state, an evaluation method for determining the attack position 18a, 20a depending on a value of the runtime characteristic, in the present case in particular a value of the runtime difference. Herein the evaluation unit 48a is provided to take into account, and in particular to use for determining an attack position 18a, 20a, for a value of the runtime characteristic below a limit value, a wavelength characteristic weighted by the runtime characteristic and, for a value of the runtime characteristic above the limit value, an unweighted wavelength characteristic. The evaluation unit 48a is thus in the present case provided to carry out a pre-selection by way of the runtime characteristic.

(38) The limit value herein corresponds to between 20% and 60%, advantageously between 30% and 50% of a maximum runtime difference, in particular of a maximally possible runtime difference, between a capturing and/or detection of the oscillation via the first position detecting element 22a and a capturing and/or detection of the oscillation via the second position detecting element 22a. In the present case the limit value corresponds exemplarily to 0.85 ms, while the maximum runtime difference is 2.32 ms.

(39) The weighted wavelength characteristic corresponds to a temporally weighted mean value of the first half-wave and the second half-wave of the oscillation and results from the following formula:
λ.sub.HW,t=t.sub.1.Math.λ.sub.HW,1+t.sub.2.Math.λ.sub.HW,2
with
t.sub.1=½.Math.(1+Δt.sub.1-2)
and
t.sub.2=½.Math.(1−Δt.sub.1-2).

(40) Herein Δt.sub.1-2 is a standardized runtime difference between a capturing and/or detection of the oscillation via the first position detecting element 22a and a capturing and/or detection of the oscillation via the second position detecting element 24a, which is correlated to the runtime characteristic. A standardization is herein effected on the basis of the maximum runtime difference. Furthermore t.sub.1 and t.sub.2 correspond to a standardized runtime of the oscillation and thus in particular to a time period between an attack of the main attack surface 14a happening and a capturing and/or detection of an oscillation correlated to the attack via the respective position detecting element 22a, 24a. A standardization is also effected on the basis of the maximum runtime difference. Moreover λ.sub.HW,1 corresponds to the first wavelength characteristic and thus in particular to the standardized time length of the first half-wave of the oscillation that has been captured and/or detected via the first position detecting element 22a. λ.sub.HW,2 furthermore corresponds to the second wavelength characteristic and thus in particular to the standardized time length of the second half-wave of the oscillation that has been captured and/or detected via the second position detecting element 24a.

(41) The unweighted wavelength characteristic furthermore corresponds in the present case to the third wavelength characteristic and thus in particular to the mean value of the first half-wave and the second half-wave of the oscillation. Principally it is however also conceivable to dispense with changing an evaluation method for determining an attack position, in particular to use merely one weighted wavelength characteristic or one unweighted wavelength characteristic.

(42) FIG. 5 shows an exemplary flow chart for detecting and determining an attack position 18a, 20a of the main attack surface 14a.

(43) In a step 60a the main attack surface 14a is attacked in an attack position 18a, 20a, as a result of which in particular an oscillation is generated correlated to the attack position 18a, 20a and depends on the attack position 18a, 20a.

(44) In a step 62a the position detecting elements 22a, 24a are provided for detecting the oscillation that is correlated to the attack position 18a, 20a and for respectively transferring an evaluation signal, in particular electrical evaluation signal, correlated to the oscillation onto the evaluation unit 48a.

(45) In a step 64a the evaluation unit 48a carries out a pre-selection depending on the evaluation signals. Herein the evaluation unit 48a decides, depending on a value of a runtime characteristic obtained from the evaluation signals, which evaluation method is used for determining the attack position 18a, 20a.

(46) In case of the value of the runtime characteristic being below a set and/or settable limit value, step 66a follows. In step 66a the evaluation unit 48a is provided for taking into account the wavelength characteristic, in particular the previously mentioned wavelength characteristic, that has been weighted by the runtime characteristic, and for using this in particular for determining the attack position 18a, 20a.

(47) In case of the value of the runtime characteristic being above the set and/or settable limit value, step 68a follows. In step 68a the evaluation unit 48a is provided to take into account the unweighted wavelength characteristic, in particular the previously mentioned unweighted wavelength characteristic, and for using this in particular for determining the attack position 18a, 20a.

(48) Independently from a chosen evaluation method, each of steps 66a and 68a is followed by step 70a. In step 70a the evaluation unit 48a transfers a result signal to the sound generator 52a, which is correlated to the determined attack position 18a, 20a. Herein the sound generator 52a generates, depending on the determined attack position 18a, 20a, an acoustical signal which varies in particular depending on a location of the attack position 18a, 20a.

(49) The flow chart in FIG. 5 is herein intended to describe, in particular, merely a possible, in particular purely exemplary flow of detecting and determining the attack position 18a, 20a of the main attack surface 14a. In particular, respective steps and/or a sequence of the steps may vary. Herein, for example, step 64a could be dispensed with, an evaluation unit using only one evaluation method.

(50) In FIG. 6 a further exemplary embodiment of the invention is shown. The following descriptions and the drawing are substantially restricted to the differences between the exemplary embodiments, wherein regarding identically denominated structural elements, in particular regarding structural elements with the same reference numerals, principally the drawings and/or the description of the other exemplary embodiment of FIGS. 1 to 5 may be referred to. For distinguishing the exemplary embodiments the letter a is set after the reference numerals of the exemplary embodiment in FIGS. 1 to 5. In the exemplary embodiment of FIG. 6 the letter a has been substituted by the letter b.

(51) The further embodiment of FIG. 6 differs from the previous exemplary embodiment at least substantially by an implementation of a position detecting unit 16b of a percussion instrument 10b.

(52) In this case position detecting elements 22b, 24b of the position detecting unit 16b are integrated in a holding unit 36b, in the present case in particular a wall of a base body 50b, which in particular allows optimizing a capturing and/or detection of an oscillation via the position detecting elements 22b, 24b, and advantageously allows improving an optical image of the percussion instrument 10b.