Headphones include a speaker unit, a baffle plate that fixes the speaker unit and includes a bass reflex port disposed therein, an ear pad disposed facing toward the baffle plate, and a sound absorber that is positioned between the baffle plate and the ear pad, and that has a hole facing the bass reflex port.

The present invention relates to a vehicle door, which is installed on the vehicle. The door includes a shutter, a speaker and an inverted tube. The shutter has an accommodation cavity, and the speaker is installed in the shutter. The inverted tube is located in the accommodation cavity, with one end connected with the interior of the vehicle, and the other end forming an acoustic port with a flange. The inverted tube exports the sound from the rear cavity into the car. The inverted tube with the acoustic port can strengthen the resonance effect of the air, and strengthen the sound wave. It can improve the loudness of the speaker, reduce the noise of the airflow, and effectively improve the sound quality of the speaker.

Headphones include a speaker unit, a baffle plate that fixes the speaker unit and includes a bass reflex port disposed therein, an ear pad disposed facing toward the baffle plate, and a sound absorber that is positioned between the baffle plate and the ear pad, and that has a hole facing the bass reflex port.

An earphone includes an acoustic transducer and a housing that includes a first acoustic chamber acoustically coupled to a first side of the acoustic transducer and a second acoustical chamber acoustically coupled to a second side of the acoustic transducer. The housing further includes a port acoustically coupling the first acoustic chamber and the second acoustic chamber. Acoustic resistive material is positioned proximate the port.

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.

A MEMS microphone includes a substrate defining a cavity including a first sidewall extending a vertical direction, a back plate disposed over the substrate and defining a plurality of acoustic holes, a diaphragm disposed between the substrate and the back plate, the diaphragm having at least one vent hole, an anchor extending from a circumference of the diaphragm to connect an end portion of the diaphragm to an upper surface of the substrate, and at least one path member communicating with the vent hole, the path member providing a flow path for the acoustic pressure to flow downwardly toward the cavity.

Various aspects include ported wearable audio devices. In certain implementations, a wearable audio device includes: a first cavity; a second cavity; a third cavity; a driver disposed between the first cavity and the second cavity, the driver configured to provide an acoustic output; a first mass and/or resistive port connecting the second cavity and the third cavity; and a second mass and/or resistive port connected to the third cavity.

An earphone body includes an internal chamber, a transducer housed in the internal chamber, a first tuned vent and a second tuned vent. The transducer has a front surface facing a direction of insertion of the earphone body in use and a rear surface 6B. The internal chamber provides a proximal acoustic volume adjacent the front surface of the transducer and a distal acoustic volume adjacent the rear surface of the transducer. The first tuned vent and the second tuned vent each extend between the distal acoustic volume and the ambient environment and are adapted to provide fluid communication between the distal acoustic volume and the ambient environment. The first tuned vent is tuned to a first frequency and the second tuned vent is tuned to a second frequency, the first frequency being lower than the second frequency.

To provide an excellent sound output device which is worn on an ear of a user and used. The sound output device includes a sound generation part and a holding part that has an opening portion and holds the sound generation part in the vicinity of an entrance of an ear canal of a user. The holding part includes a ring body having the opening portion, and a housing of the sound generation part is integrated with a part of the ring body. The sound generation part includes a sound generation element having a dynamic type driver, and has a hollow exhaust part joining with a rear surface of the housing of the sound generation part. The exhaust part extends from a rear surface side of the housing across an intertragic notch and has an exhaust hole outside an auricle.

Disclosed is a receiver unit having a pressure equilibrium structure and a compensation structure for a low frequency, including a receiver including a frame, a magnetic circuit, a voice coil, and a diaphragm, an upper casing covering an upper portion and a side surface of the receiver and having a sound insulation hole, and a lower casing attached to a lower surface of the receiver and coupled to the upper casing, wherein a ventilation recess is provided on an outer surface of the upper casing to allow air to flow between an upper space of the upper casing and a lower space of the lower casing, the receiver includes a back hole, and the lower casing includes a duct connecting the back hole and the lower space of the lower casing.