Microphone arrays comprise several microphone capsules, the outputs of which being electronically combined for directional recording of sound. The directional and frequency properties of the microphone array depend on the number and positions of the microphone array. In order to obtain the smallest possible microphone array with only few microphone capsules, which, however, has an essentially uniform directional and frequency dependence over a speech frequency range, is scalable and robust against small incorrect positioning of the capsules, fifteen or twenty-one microphone capsules (K.sub.15,11-K.sub.15,35, K.sub.21,11-K.sub.21,37) are arranged on a carrier such that they lie on three similar branches, each with the same number of microphone capsules, which are rotated against each other by 120°. Each of the microphone capsules lies on a corner of a triangle of a grid in a flat isometric coordinate system with three axes rotated by 120° against each other and forming the grid of equilateral triangles.

A microphone 12 joined by a support means 16 to a case 14 which communicates speech into light displayed through a transparent case top 10. The support mean is made of a sufficiently flexible material so it functions as a clasp repeatedly without fracturing. The support means 16 can be molded construction or pieces 20, 22, 32 joined with adhesive, pressure, heat, fasteners or other means. The case top 10 is made of a transparent material. In addition, the case may receive case tops via tabs 48 and tab holes 50, adhesive or fasteners such through holes 44 and onto supports 46.

A microphone 12 joined by a support means 16 to a case 14 which communicates speech into light displayed through a transparent case top 10. The support mean is made of a sufficiently flexible material so it functions as a clasp repeatedly without fracturing. The support means 16 can be molded construction or pieces 20, 22, 32 joined with adhesive, pressure, heat, fasteners or other means. The case top 10 is made of a transparent material. In addition, the case may receive case tops via tabs 48 and tab holes 50, adhesive or fasteners such through holes 44 and onto supports 46.

The present disclosure is directed to electroacoustical devices comprising patterned MXene compositions on biaxially oriented polymer substrates and methods of making and using the same.

The present disclosure is directed to electroacoustical devices comprising patterned MXene compositions on biaxially oriented polymer substrates and methods of making and using the same.

Provided is a Direction Finding Acoustic Sensor comprising a first sound sensor and a second sound sensor, where the first and second sound sensors are generally maintained in a reflectional symmetry around an axis of symmetry. A digital device in data communication both sound sensors receives a signal P.sub.L from the first sensor a signal P.sub.R from the second sensor based on displacement respective sensors. The digital device evaluates a difference between an α.sub.1P.sub.L and an α.sub.2P.sub.R relative to a sum of the α.sub.1P.sub.L and the α.sub.2P.sub.R, and provides an angle θ.sub.S corresponding to the result. Typically, the Direction Finding Acoustic Sensor communicates the θ.sub.s determined using some appropriate reference frame, such as the axis of symmetry. The Direction Finding Acoustic Sensor is capable of providing an unambiguous direction within an angle of ±(90°−θ.sub.off) of the axis of symmetry.

A microphone assembly includes a housing including a sound port and an external-device interface having a plurality of electrical contacts. An acoustic transducer, such as a MEMS microphone, is disposed in the housing and is in acoustic communication with the sound port. An electrical circuit is disposed in the housing that is electrically coupled to the acoustic transducer and to electrical contacts on the external-device interface. A magnetic transducer including an electrical coil disposed about a core, such as a telecoil or charging coil configuration, is fastened to the housing. The electrical coil having leads, at least one of the leads electrically terminated at a coil contact of the housing.

A microphone assembly includes a housing including a sound port and an external-device interface having a plurality of electrical contacts. An acoustic transducer, such as a MEMS microphone, is disposed in the housing and is in acoustic communication with the sound port. An electrical circuit is disposed in the housing that is electrically coupled to the acoustic transducer and to electrical contacts on the external-device interface. A magnetic transducer including an electrical coil disposed about a core, such as a telecoil or charging coil configuration, is fastened to the housing. The electrical coil having leads, at least one of the leads electrically terminated at a coil contact of the housing.

A signal converter includes a chamber, a first diaphragm, a second diaphragm, and a first converter. The chamber has a first opening at one end and a second opening at a second end opposite the first end. The first diaphragm is disposed so as to cover the first opening. The second diaphragm is disposed so as to cover the second opening. The first converter is disposed in the chamber and configured to generate a first signal based on a vibration of the first diaphragm.

A signal converter includes a chamber, a first diaphragm, a second diaphragm, and a first converter. The chamber has a first opening at one end and a second opening at a second end opposite the first end. The first diaphragm is disposed so as to cover the first opening. The second diaphragm is disposed so as to cover the second opening. The first converter is disposed in the chamber and configured to generate a first signal based on a vibration of the first diaphragm.