A microphone head device includes a base unit, a microphone head unit and a connecting rod unit. The microphone head unit is disposed on the base unit, and includes a microphone head seat and a dynamic subunit mounted on the microphone head seat. The dynamic subunit includes a mounting seat, a first magnetic member disposed on the mounting seat, a coil surrounding the first magnetic member, and a vibrating plate disposed over the first magnetic member and connected to the coil. The connecting rod unit extends in an up-down direction through the first magnetic member, the mounting seat and the microphone head seat such that the first magnetic member, the mounting seat and the microphone head set are separably secured.

A unidirectional condenser microphone having a front opening portion and a rear opening portion for respectively passing sound waves to a front surface and a back surface of a diaphragm of a microphone unit, the unidirectional condenser microphone includes: an acoustic tube provided in the front opening portion; a first air chamber provided between the rear opening portion and the back surface of the diaphragm of the microphone unit, and having a predetermined acoustic capacity; and a second air chamber communicating into the first air chamber, and having an acoustic capacity larger than the predetermined acoustic capacity, wherein sensitivity to a direction of 0° with respect to a directional axis is improved by the first air chamber and the acoustic tube, and a proximity effect due to the sound wave from a direction of 180° with respect to the directional axis is prevented by the second air chamber.

An acoustic sensor assembly that produces an electrical signal representative of an acoustic signal, includes an acoustic transduction element disposed in a housing and acoustically, a heat source causing air pressure variations within the housing when energized, and an electrical circuit electrically coupled to the acoustic transduction element and to contacts on an external-device interface of the housing, wherein the electrical circuit is configured to energize the heat source and determine a non-acoustic condition or change therein based on an amplitude of air pressure variations detected by the acoustic transduction element.

A microphone assembly comprising: a microphone for converting an acoustic signal to an electrical microphone signal; a tube enclosing at least a part of a first conductor for conducting the microphone signal, the tube comprising a rigid first tube part and a rigid second tube part. The first tube part has a first primary tube end and a first secondary tube end, wherein the microphone is attached at the first primary tube end. The second tube part has a second primary tube end and a second secondary tube end. A first rotating connector between the first tube part and the second tube part allows rotating the first tube part in relation to the second tube part about a first rotation axis.

A tunable ribbon microphone having magnets positioned within a small gap in between pieces of opposite poles. A conductive ribbon placed in an air gap between the magnets by an adjustable ribbon holder structure. The adjustable ribbon holder structure includes two ribbon holders and a ribbon tension control. The ribbon holder can be fixed from one side by sliding on one side or sliding on both sides. The ribbon tension control adjusts the tension of the elastic ribbon. By turning the ribbon tension control, turning motion translate to linear motion and change the distance between the ribbon holders and alter the tension of the ribbon. Changing the ribbon tension also possible by different ribbon tension control mechanism by rolled or folded the ribbon in one side or both side of the microphone. The tunable ribbon microphone may have more than one ribbon, adjustable ribbon holder structure and ribbon tension control.

A tunable ribbon microphone having magnets positioned within a small gap in between pieces of opposite poles. A conductive ribbon placed in an air gap between the magnets by an adjustable ribbon holder structure. The adjustable ribbon holder structure includes two ribbon holders and a ribbon tension control. The ribbon holder can be fixed from one side by sliding on one side or sliding on both sides. The ribbon tension control adjusts the tension of the elastic ribbon. By turning the ribbon tension control, turning motion translate to linear motion and change the distance between the ribbon holders and alter the tension of the ribbon. Changing the ribbon tension also possible by different ribbon tension control mechanism by rolled or folded the ribbon in one side or both side of the microphone. The tunable ribbon microphone may have more than one ribbon, adjustable ribbon holder structure and ribbon tension control.

In a unidirectional dynamic microphone unit, a cylindrical tube is provided to cover the microphone unit, a cylindrical wall of a first cylindrical portion that is included in the cylindrical tube and extends to at least the rearward is provided with a rear sound wave introducing portion weighted such that an acoustic resistance value is gradually made smaller toward the rearward side from positions of sound holes for taking in a sound wave transmitting around from the rearward side, preferably formed of a trumpet-shaped opening, and it is possible to enhance the sensibility to sound pressures without degradation of the frequency response and the directionality.

In a unidirectional dynamic microphone unit, a cylindrical tube is provided to cover the microphone unit, a cylindrical wall of a first cylindrical portion that is included in the cylindrical tube and extends to at least the rearward is provided with a rear sound wave introducing portion weighted such that an acoustic resistance value is gradually made smaller toward the rearward side from positions of sound holes for taking in a sound wave transmitting around from the rearward side, preferably formed of a trumpet-shaped opening, and it is possible to enhance the sensibility to sound pressures without degradation of the frequency response and the directionality.

A modular speaker system, comprising an exoskeleton, configured to mechanically support and quick attach and release at least one functional panel and an electrical interface provided within the exoskeleton, configured to mate with a corresponding electrical connector of the functional panel. An optional endoskeleton is provided to support internal components. The system preferably provides a digital electronic controller, and the electrical interface is a digital data and power bus, with multiplexed communications between the elements of the system. The elements of the system preferably include at least one speaker, and other audiovisual and communications components. Multiple modules may be interconnected, communicating through the electrical interface. A base module may be provided to provide power and typical control, user and audiovisual interface connectors.

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.