An electro-acoustic transducer is provided that comprises a diaphragm and a magnet assembly comprising a magnet and a back plate. The back plate comprises at least one first vent. The diaphragm generates sound during a movement of the diaphragm relative to the back plate. The transducer further comprises a printed circuit board comprising at least one second vent and a cavity between the printed circuit board and the back plate that separates the at least one first vent from the at least one second vent.

An earphone comprising an earphone housing having a wall comprising (1) a front side that joins (2) an end portion in which a primary sound output opening is formed, which joins (3) a face portion in which a secondary output opening is formed, which joins (4) a back side which joins the front side and encloses a driver, wherein the face portion and the front side form a tapered portion of the earphone housing that is dimensioned to be inserted into, and contact, an ear of a wearer, wherein the primary output opening is dimensioned to output sound generated by a diaphragm of the driver contained within the earphone housing into the ear, the secondary output opening is dimensioned to vent the ear to a surrounding environment, and wherein the primary output opening and the secondary output opening face different directions and are positioned over a sound output face of the driver.

An earcup for a headphone, comprising at least one earcup comprising a front opening adapted to be adjacent to the ear of a user of the headphone, a baffle disposed within the earcup to define front and rear cavities, an outer cup arranged to accommodate the rear cavities, a first inner cup arranged within the rear cavity surrounding the front opening, a transducer and an earpad extending around the periphery of the front opening of the earcup arranged to accommodate the front cavity and the ear of the user, and wherein the earcup comprises a second inner cup arranged between the outer cup and the back-volume cup for providing an acoustic barrier between outside noise and the ear of the user.

The present disclosure may provide a sound-producing device comprising a diaphragm and a housing. The housing may include a first sound guide hole and a second sound guide hole. The diaphragm may be disposed in the housing. A first acoustic cavity and a second acoustic cavity are located on both sides of the diaphragm. The first sound guide hole is acoustically coupled to the first acoustic cavity, and the second sound guide hole is acoustically coupled to the second acoustic cavity. The first sound guide hole includes a first hole part and a second hole part. The first hole part and the second hole part are connected, the first hole part is located at a first side wall of the housing, the second hole part is located at a second side wall of the housing, and the first side wall and the second side wall are two adjacent side walls of the housing.

Systems, devices, methods, and non-transitory, machine-readable media may correspond to in-ear acoustic devices, such as an earbud, with transparency and noise-cancellation. The earbud may include one or a combination of the following. A housing may include a first section and a second section. A speaker may be housed by the housing. A first volume may be partially defined by the speaker and the first section. A second volume may be partially defined by the speaker and the second section. A bypass duct may fluidically connect the first volume with the second volume. The bypass duct may include a vent to outside of the housing.

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.

An acoustic sensor device comprises a package and a substrate disposed in the package. The acoustic sensor device also comprises a microelectromechanical system (MEMS) transducer formed in the substrate, the MEMS transducer i) comprising a cantilever structure and ii) having a first acoustic impedance and at least two sound ports positioned on the package on opposing sides of the MEMS transducer. The at least two sound ports coupling the MEMS transducer to an ambient environment via respective acoustic channels formed in the package, wherein the at least two sound ports are positioned on the package in a manner that ensures that the respective acoustic channels have a combined second acoustic impendence that is less the first acoustic impedance of the MEMS transducer.