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.

A sound-receiving system is provided, including: a sound-guiding tube, a microphone, and an acoustic perforated sheet. The sound-guiding tube has a winding path, including a first end, a second end, and a sound-receiving hole. The second end is opposite the first end. The sound-receiving hole is disposed at the first end. The microphone is abutted against the second end. The acoustic perforated sheet is disposed adjacent to the sound-receiving hole and is a distance away from the sound-receiving hole. The sound-receiving hole is offset from the microphone. The acoustic perforated sheet reduces and filters the frequency response of a specific frequency range of the microphone.

This present disclosure discloses an acoustic output device comprising: an acoustic driver that includes a diaphragm and a magnetic circuit structure, wherein a side of the diaphragm facing away from the magnetic circuit structure forms a front side of the acoustic driver, a side of the magnetic circuit structure facing away from the diaphragm forms a back side of the acoustic driver, the diaphragm vibrates so that the acoustic driver radiates sound outward from its front and back, respectively; a housing structure configured to carry the acoustic driver, wherein the back side of the acoustic driver and the housing structure form a back cavity, and different side walls of the back cavity are connected by a curved structure; the housing structure includes at least one sound outlet hole, the at least one sound outlet hole is acoustically coupled with the back cavity.

An electroacoustic module includes an installation member, first and second sounding devices. The installation member includes first and second installation cavities, first and second sound outlets, and a sound guide channel. The first sounding device in the first installation cavity divides the first installation cavity into a first front cavity connected to the first sound outlet and a first rear cavity. The second sounding device in the second installation cavity divides the second installation cavity into a second front cavity connected to the second sound outlet and a second rear cavity which is a closed cavity and which is connected to the first rear cavity through the sound guide channel. A phase of a first sound wave emitted by the first sounding device through the first sound outlet is different from a phase of a second sound wave emitted by the first sounding device through the second sound outlet.

A wearable audio device can include at least one speaker; a first sensor configured to sense sound related to the at least one speaker and provide a first sensor signal; a second sensor configured to sense sound external to the wearable device and provide a second sensor signal; active noise cancellation (ANC) circuitry configured to provide at least a third signal and fourth signal, wherein the third signal is a music compensated first sensor signal and the fourth signal is an ANC signal; at least one active vent; and at least one processor configured to: receive the first sensor signal, the second sensor signal, the third signal and the fourth signal to determine whether a trigger threshold is met, and if the trigger threshold is met, send a control signal to the at least one active vent to cause the at least one active vent to open or close.

Example techniques may involve reduction of turbulence noise from a sound transducer that is mounted within an interior housing of a playback device. An example playback device may include an enclosure comprising a first interior volume and a second interior volume. The playback device may further include a speaker mounted within an interior of the enclosure. The speaker includes a diaphragm dividing the first interior volume and the second interior volume and the speaker is moveable along an axis to generate sound. The playback device may also include a first speaker vent providing airflow between the first interior volume and an exterior of the enclosure and a second speaker vent providing airflow between the first interior volume and the exterior of the enclosure. The first speaker vent directs airflow in a first direction and second speaker vent directs airflow in a second direction.

A headphone includes an ear-cup housing and an audio driver. The audio driver has a driver housing, and a driver aperture extending through the audio driver from an exterior thereof toward a diaphragm. A mass port plug is disposed at least partially within the driver aperture extending through the audio driver. The mass port plug has an acoustic aperture extending through the mass port plug from a first side thereof to an opposing second side thereof, and the acoustic aperture is configured to cause the audio driver to exhibit a selected detectable sound pressure level (SPL) profile. Methods of fabricating headphones include insertion of such a mass port plug into a driver aperture extending through an audio driver. The mass port plugs and methods may be used to adapt substantially identical audio drivers for use in ear-cup housings having differing configurations while providing selected detectable sound pressure level profiles.

The conversion element member of the present disclosure includes: a conversion element having an opening capable of functioning as a ventilation port and/or a sound-transmitting port; and a waterproof membrane. The conversion element has an outer surface provided with the opening. The waterproof membrane is joined, at a joining portion thereof, to the outer surface of the element so as to cover the opening, the joining portion having a shape surrounding the opening when viewed in a direction perpendicular to the outer surface. The waterproof membrane has a non-joining portion defined as a portion surrounded by the joining portion when viewed in the direction, the non-joining portion having a region overlapping the outer surface when viewed in the direction. A spacing distance D1 between the membrane and the outer surface in the region is 0.01 mm to X mm, where X represents, in an indentation test on the waterproof membrane.

A headset cup having a front cavity and a rear cavity separated by a driver, with a mass port tube connected to the rear port to present a reactive acoustic impedance to the rear cavity, in parallel with a resistive port, the total acoustic response of the rear cavity remaining linear at high power levels. In some embodiments, the mass port tube is made of metal, while the headset cup is otherwise made of plastic.

The present disclosure discloses an acoustic output apparatus. The acoustic output apparatus may include an acoustic driver. The acoustic driver may include a diaphragm and a magnetic circuit structure. A front side of the acoustic driver may be formed at a side of the diaphragm away from the magnetic circuit structure. A rear side of the acoustic driver may be formed at a side of the magnetic circuit structure away from the diaphragm. The diaphragm may vibrate to cause the acoustic driver to radiate sound outward from the front side and the rear side of the acoustic driver. The acoustic output apparatus may further include a housing structure configured to carry the acoustic driver. One side of the front side and the rear side of the acoustic driver may form a cavity with the housing structure. The side of the acoustic driver forming the cavity may radiate the sound towards the cavity, and the other side of the acoustic driver may radiate the sound towards outside of the acoustic output apparatus.