A top port MEMS microphone package includes a substrate having a back volume expanding aperture therein. A MEMS microphone electronic component is mounted to the substrate directly above the back volume expanding aperture such that an aperture of the MEMS microphone electronic component is in fluid communication with the back volume expanding aperture. A lid having a lid cavity is mounted to the substrate. The back volume expanding aperture couples the aperture of the MEMS microphone electronic component to the lid cavity. By coupling the lid cavity to the aperture with the back volume expanding aperture, the resulting back volume is essentially the size of the entire top port MEMS microphone package. In this manner, the noise to signal ratio is minimized thus maximizing the sensitivity of the top port MEMS microphone package as well as the range of applications.

A device (1) for airborne sound acoustic sensing of the surroundings of a vehicle, the device (1), comprising at least one microphone (2), which is integrated in a housing (3) which, in the region of the microphone (2), has at least one opening (4) for the entry of sound waves. According to the invention, in the region of the opening (4) and at a distance from the microphone (2) there is arranged at least one film or membrane (5) which, together with the microphone (2) and the housing (3), delimits an ante-volume (6), the cross-sectional area of which increases from inside to outside in relation to the housing (3), so that a cross sectional area (A) of the ante-volume (6) adjacent to the film or membrane (5) is greater than a cross sectional area (B) of the ante-volume (6) adjacent to the microphone (2).

An air-pulse generating device, a wearable sound device, a fanless blower, and an airflow producing method are disclosed. The air-pulse generating device includes a film structure, configured to be actuated to generate a plurality of air pulses at an ultrasonic pulse rate. The plurality of air pulses produces a net airflow toward one single direction.

An MEMS microphone is disclosed, which comprises a substrate and a vibrating diaphragm and a back electrode which are located above the substrate, a plurality of comb tooth parts are formed in edge positions of the vibrating diaphragm, and the plurality of comb tooth parts are distributed in a peripheral direction of the vibrating diaphragm at intervals, wherein a position between every two adjacent comb tooth parts on the vibrating diaphragm is connected to the substrate via an insulating layer; and the comb tooth parts on the vibrating diaphragm are at least partially overlapped with the substrate, and a clearance exists between the comb tooth parts and the substrate and is configured as an airflow circulation channel. The microphone of the present invention has better impact resistance and can avoid intrusion of dust.

The present disclosure provides an earphone device with sound adjustment capability that allows a user to dynamically adjust sound acoustics resonating from the device. In one aspect, the earphone device includes a housing having an acoustic output port. The acoustic output port is adapted to receive an audio signal. In this regard, sound resonates from the acoustic output port based on the audio signal. The earphone device also includes a telescopic portion having a hollow tube portion attached to the housing. The hollow tube portion may be in communication with the acoustic output port. The telescopic portion is configured to receive a fitting member. The fitting member is configured to adjust a bass range of the outputted sound resonating from the acoustic output port by passing through the telescopic portion so as to adjust a length of the hollow tube portion.

An earpiece includes an electro-acoustic transducer and a housing that supports the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume. The electro-acoustic transducer is arranged such that a first radiating surface of the transducer radiates acoustic energy into the first acoustic volume and a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume. A mesh is disposed along an outlet of the housing and is arranged to inhibit debris from entering the front acoustic volume. A first microphone is supported in the housing. The first microphone includes a microphone port for sensing pressure. A chimney surrounds the microphone port and mechanically couples the first microphone to the mesh.

A loudspeaker and a method of operation which allow for the production and emphasis of extremely low bass tones. The loudspeaker generally is formed from a loudspeaker driver cone of conventional type which is placed in a very small enclosure with two waveguides attached thereto. A smaller balance waveguide is positioned forward of the face of the cone and a larger tuning waveguide is positioned to the side of the cone. The cross-sectional area of the aperture connections of both waveguides to the enclosure are small compared to the cross-sectional area of the loudspeaker driver cone.

There are provided headphones and a speaker unit having proper acoustic properties and exhibiting excellent reproduced sound quality even in the case of providing air holes at a damping member. The headphones include a speaker unit having a diaphragm and a frame supporting an outer peripheral portion of the diaphragm, a housing configured to house the speaker unit, and a damping member made of a material exhibiting air permeability and attached to cover an opening of the frame through which a sound wave emitted from the diaphragm passes and/or an opening of the housing. The damping member has one or more air holes formed by removal of the material forming the damping member. A secondary damping member is attached to an annular edge portion defining each air hole, thereby reducing vibration of the edge portion.

Headphones may include an ear-cup housing and an audio driver disposed at least partially within the ear-cup housing. The audio driver may include a driver housing, a diaphragm suspended from the driver housing, one of a magnet and a coil carried on a back side of the diaphragm, and another of the magnet and the coil carried by the driver housing behind the diaphragm, the magnet and coil magnetically coupled with one another such that electrical current flowing through the coil generates a magnetic force acting on the diaphragm through the magnet or coil carried on the back side of the diaphragm. A port may extend through a surface of the driver housing directly between an acoustical cavity within the driver housing and an exterior of the ear-cup housing without communicating acoustically with a volume of space outside the driver housing and within the ear-cup housing.

An acoustic sensor assembly includes a housing having an external-device interface and a sound port to an interior of the housing. An electro-acoustic transducer and an electrical circuit are disposed within the housing. The electro-acoustic transducer separates the interior into a front volume and a back volume, where the sound port acoustically couples the front volume to an exterior of the housing. The back volume includes a first portion and a second portion. The electrical circuit is electrically coupled to the electro-acoustic transducer and to the external-device interface. One or more apertures acoustically couple the first and second portions of the back volume and are structured to shape a frequency response of the acoustic sensor assembly.