Sound reproduction device, method for adapting a sound reproduction device, diving goggles, and communication device

Abstract

The invention relates to a sound reproduction device which comprises a signal source, a power source, an amplifier, and a loudspeaker. The sound reproduction device further comprises an impedance measuring device and an analysis device. The impedance measuring device is connected to loudspeaker leads of the loudspeaker in order to measure impedance values, and the impedance measuring device is connected to the analysis device in order to forward the measurement results. The analysis device is also connected to the signal source and/or to the amplifier in order to adapt a signal fed to the loudspeaker.

Claims

1. A method for adapting a sound reproduction device, which comprises a signal source, a power source, an amplifier and a loudspeaker, to different environmental media such as air and water, wherein by means of an impedance measuring device a measurement of at least one impedance value of the loudspeaker is performed, wherein a measurement result is forwarded to an analysis device, wherein from the measurement result the medium, in which the loudspeaker is located, is determined by the analysis device, wherein at least one of the signal source or the amplifier is controlled by the analysis device in such a manner that at least one of reproduction volume or frequency response is adapted to the detected medium in such a way that regardless of the medium in which the loudspeaker is operated, a consistent listening experience is ensured for a user.

2. The method as claimed in claim 1, wherein the at least one impedance value is measured by the impedance measuring device continuously, or the at least one impedance value is measured by the impedance measuring device at intervals, or the at least one impedance value is measured by the impedance measuring device in an event-driven manner.

3. The method as claimed in claim 1, wherein the measurement of the at least one impedance value by the impedance measuring device is performed in a region of a resonance of the loudspeaker.

4. The method as claimed in claim 1, wherein a test signal is generated by a tone generator of the sound reproduction device and transmitted to the loudspeaker, and at the same time the measurement of the at least one impedance value is carried out with the impedance measuring device.

5. The method as claimed in claim 4, wherein the test signal is generated during a communication pause.

6. The method as claimed in claim 4, wherein the test signal is generated in a frequency range which is not perceptible by the user.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Additional details of the present invention are described in the drawing on the basis of exemplary embodiments shown schematically.

(2) FIG. 1 is a schematic circuit diagram of a first design variant of a sound reproduction device according to the present invention;

(3) FIG. 2 is a schematic circuit diagram of a second design variant of a sound reproduction device according to the present invention; and

(4) FIG. 3 is a pair of diving goggles according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(5) FIG. 1 shows a schematic circuit diagram of a first design variant of a sound reproduction device 1 according to the present invention. The sound reproduction device 1 comprises a signal source 2, a power source 3, an amplifier 4, and a loudspeaker 5. The sound reproduction device 1 also comprises an impedance measuring device 6 and an analysis device 7.

(6) In this case, the impedance measuring device 6 is connected to loudspeaker leads 5a, 5b of the loudspeaker 5 in order to measure the impedance values. The impedance measuring device 6 is connected to the analysis device 7 in order to transmit measurement results. The analysis device 7 is connected to the signal source 2 and to the amplifier 4 in order to adapt a signal fed to the loudspeaker 5. According to a design variant not shown, there is also provision to connect the analysis device 7 only to the signal source 2 or only to the amplifier 4. The power source 3 supplies the amplifier 4, the analysis device 7 and the impedance measuring device 6 with electrical energy. The loudspeaker 5 is located in a first medium M1, in which a user N of the sound reproduction device 1 is also located. Therefore, a diaphragm 8 of the loudspeaker 5 is also surrounded on both sides by the first medium M1.

(7) In order then to adapt the sound reproduction device 1 to the medium M1, which is air, for example, to a second medium, for example, water, a measurement of at least one impedance value of the loudspeaker 5 is performed by the impedance measuring device 6. The measurement result is then forwarded via a data cable K67 to the analysis device 7. The analysis device 7 then determines, on the basis of the measurement result, the medium in which the loudspeaker is located. Then the analysis device 7 controls the signal source 2 via a data cable K72 and controls the amplifier 3 via a data cable K73, in such a way that parameters such as playback volume and/or frequency response are adapted to the detected medium in such a way that, regardless of the medium in which the loudspeaker 5 is currently being operated and in which the user N is therefore located, a consistent listening experience is ensured for the user N. The term consistent listening experience is understood in the sense of the present invention to mean that both the sound volume perceived by the user is maintained and, in particular, the acoustic image perceived by the user is also maintained. The objective is to adapt the listening experience in the two media to each other in such a way that a change in medium is not apparent to the user on the basis of the sounds reproduced by the sound reproduction device, in order thus to enable an uninterrupted communication.

(8) In accordance with one design variant, the sound reproduction device 1 comprises a tone generator 9, shown by dashed lines. By means of the tone generator 9, sound signals can be generated and transmitted to the loudspeaker 5. This means it is possible to measure impedance values of the loudspeaker 5 at individual frequencies. The tone generator 9 is arranged in the analysis device 7 and is controlled, or enabled and disabled thereby, as required.

(9) As shown in FIG. 1, in the first medium M1 the diaphragm 8 of the loudspeaker 5 of the sound reproduction device 1 is bounded by the medium on both sides.

(10) FIG. 2 shows a schematic circuit diagram of a second design variant of a sound reproduction device 101 according to the present invention. With regard to the fundamental structure of the sound reproduction device 101, reference is made to the description of the sound reproduction device shown in FIG. 1, wherein the reference numerals for the components shown in FIG. 2 are each increased by 100. In contrast to the sound reproduction device shown in FIG. 1, the loudspeaker 105 of the sound reproduction device 101 shown in FIG. 2 is located in a second medium M2, which is formed by water and is different from the first medium M1 with regard to its density. The sound reproduction device 101 comprises a series resistance 110, wherein the series resistance 110 is connected upstream of the loudspeaker 105 when measuring impedance values with the impedance measuring device 106. For this purpose, a first switch 111 shown in the open position is then closed and a second switch 112, shown in the closed position, is then opened. The medium M2 also surrounds the diaphragm 108 of the loudspeaker 105 on all sides.

(11) In FIG. 3, a pair of diving goggles 201 according to the present invention is shown schematically in a perspective view. The goggles 201 comprise a sound reproduction device 1 as shown and described in FIG. 1. In this figure, the sound reproduction device 1 is only shown schematically in the area of a mask 202 of the diving goggles 201, wherein the loudspeaker 5 is also illustrated schematically and is arranged on the mask 202 of the diving goggles 201.

(12) The diving goggles 201 also comprise a sound recording device 51. The sound recording device 51 is arranged in an area of the mask 202, in which one end of a strap of the goggles 203 is attached to the mask 202. This comprises a microphone 52, which is implemented as a body contact microphone 53 and is arranged on a flexible arm 54 in such a way that it can be placed on a body of a user, not shown.

(13) The diving goggles 201 and/or the sound reproduction device 1 and the sound recording device 51 comprises or comprise a transmitting and receiving device 55. In this case, the sound reproduction device 1 and the sound recording device 51 are connected to the transmitting and receiving device 55, so that voice signals can be transmitted and received wirelessly via this device. Of course, the sound reproduction device 1 and the sound recording device 51 are connected to each other via data cables, not shown.

(14) The components of sound reproduction device 1, sound recording device 51 and transmitting and receiving device 55 form an acoustic communication device 301 independently of the goggles 201.

LIST OF REFERENCE NUMERALS

(15) 1 sound reproduction device

(16) 2 signal source

(17) 3 power source

(18) 4 amplifier

(19) 5 loudspeaker

(20) 5a, 5b loudspeaker lead

(21) 6 impedance measuring device

(22) 7 analysis device

(23) 8 diaphragm of 5

(24) 9 tone generator

(25) 51 sound recording device

(26) 52 microphone

(27) 53 body contact microphone

(28) 54 flexible arm of 51

(29) 55 transmitting and receiving device

(30) 101 sound reproduction device

(31) 102 signal source

(32) 103 power source

(33) 104 amplifier

(34) 105 loudspeaker

(35) 105a loudspeaker lead

(36) 105b loudspeaker lead

(37) 106 impedance measuring device

(38) 107 analysis device

(39) 108 diaphragm of 5

(40) 109 tone generator

(41) 110 series resistance

(42) 111 first switch

(43) 112 second switch

(44) 201 diving goggles

(45) 202 mask of 201

(46) 203 goggles strap

(47) 301 communication device

(48) K67 data cable between 6 and 7

(49) K72 data cable between 7 and 2

(50) K73 data cable between 7 and 3

(51) K167 data cable between 106 and 107

(52) K172 data cable between 107 and 102

(53) K173 data cable between 107 and 103

(54) M1 first medium, air

(55) M2 second medium, water

(56) N user