A wind instrument such as a harmonica has a mouthpiece with one or more air channels, an electric power source, and a means for generating an electrical output signal from strain gages exposed to airflow in the channels. First and second strain gages having variable flow-induced resistance are bonded to a flexible substrate and suspended within an air channel, which includes a divider shelf for directing a first airflow to the first strain gage and a second airflow to the second strain gage. Complimentary strain gages are mounted to an opposite side of the substrate for inverse flexure to enable temperature correction for the first and second strain gages. When a user forces air through a channel in a direction biased to one side of the divider shelf a difference signal is generated by the first and second strain gages and detected by comparing their outputs. The difference signal can be used to adjust a variable control signal in applications such as volume control, dimming lights, or bending notes generated by the harmonica.

The present invention envisages a harmonica holder for releaseably holding and amplifying the sound of the harmonica. The harmonica holder comprises a holder portion for releasably holding a harmonica, wherein the holder portion includes a pair of holder plates having a means to selectively hold and release the harmonica; and a horn portion extending from the holder portion, wherein one end of the horn portion is connected to the holder portion such that the sound emitted from the harmonica travels thru the horn portion, thereby getting amplified, the horn portion having a bell-like configuration and airholes configured thereon.

A wind instrument such as a harmonica has a mouthpiece with one or more air channels, an electric power source, and a means for generating an electrical output signal from strain gages exposed to airflow in the channels. First and second strain gages having variable flow-induced resistance are bonded to a flexible substrate and suspended within an air channel, which includes a divider shelf for directing a first airflow to the first strain gage and a second airflow to the second strain gage. Complimentary strain gages are mounted to an opposite side of the substrate for inverse flexure to enable temperature correction for the first and second strain gages. When a user forces air through a channel in a direction biased to one side of the divider shelf a difference signal is generated by the first and second strain gages and detected by comparing their outputs. The difference signal can be used to adjust a variable control signal in applications such as volume control, dimming lights, or bending notes generated by the harmonica.

A wind instrument such as a harmonica has a mouthpiece with one or more air channels, an electric power source, and a means for generating an electrical output signal from strain gages exposed to airflow in the channels. First and second strain gages having variable flow-induced resistance are bonded to a flexible substrate and suspended within an air channel, which includes a divider shelf for directing a first airflow to the first strain gage and a second airflow to the second strain gage. Complimentary strain gages are mounted to an opposite side of the substrate for inverse flexure to enable temperature correction for the first and second strain gages. When a user forces air through a channel in a direction biased to one side of the divider shelf a difference signal is generated by the first and second strain gages and detected by comparing their outputs. The difference signal can be used to adjust a variable control signal in applications such as volume control, dimming lights, or bending notes generated by the harmonica.

A displacement amount detecting apparatus is provided and includes: transmission member, transmitting a displacement on one end side thereof to a displacement on the other end side thereof; a sensor, disposed to face the other end side of the transmission member, and configured to output a value according to a distance between the sensor and the other end side of the transmission member; a calculation device, calculating a value for indicating the distance based on the value output by the sensor and a reference value; and a correction device, correcting the reference value. When the one end side is displaced in a first direction, the other end side is displaced in a second direction opposite to the first direction and away from the sensor. The correction device is configured to correct the reference value based on the value for indicating the distance calculated by the calculation device.

An attachment for a harmonica or a pulmonary harmonica may include a resistance band or modified comb which increases respiratory resistance from the typical open holes of harmonicas. The resistance band or modified comb may prevent a broken reed from being inhaled into the mouth.

An instrument holder (1) which provides for the flexible holding of different instruments (3) within a housing (2). The instrument holder includes at least one spring clip (4-12) which contacts and/or acts upon the instrument (3) inserted in each case.

A harmonica including at least a comb including a plurality of chambers, a first plate including a plurality of blow reeds, a second plate including a plurality of draw reeds, the harmonica wherein each chamber of the plurality of chambers includes at least one material projection, each material projection being configured to reduce the oscillatory space of a draw reed, and in that it includes at least one additional plate arranged above the first plate and including a plurality of additional material projections, each additional material projection of the plurality of additional material projections being configured to reduce the oscillatory space of a blow reed.

A harmonica including at least a comb including a plurality of chambers, a first plate including a plurality of blow reeds, a second plate including a plurality of draw reeds, the harmonica wherein each chamber of the plurality of chambers includes at least one material projection, each material projection being configured to reduce the oscillatory space of a draw reed, and in that it includes at least one additional plate arranged above the first plate and including a plurality of additional material projections, each additional material projection of the plurality of additional material projections being configured to reduce the oscillatory space of a blow reed.

An acoustic instrument soother for infants and young children, combining a pacifier, a teether, and a mouthguard with a harmonica to generate sound. The device incorporates non-electronic musical elements, aiming to soothe and entertain young users while fostering early musical education. The harmonica component features multiple mouthpieces for sound production, activated by the user's inhalation and exhalation. Through the integration of music notation symbols engraved on its surface, the device provides vocal and music notation lessons, enhancing the user's auditory and cognitive development.