A loudspeaker parameter system for vented box driver excursion modeling, may include a loudspeaker driver having a conductor, a magnet and a diaphragm. The system may further include a processor for excursion modeling configured to receive an input signal, determine a voltage level of the input signal, an enclosure having a resonant port, estimate port parameters including at least one of an acoustic resistance or acoustic mass, and apply a voltage limit based on the vented box excursion model utilizing the port parameters.

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.

A headphone comprising: two headphone earcups each comprising: an earcup housing defining an active chamber that acoustically couples a sound output side of a speaker to an ear of a user, and an inactive chamber that surrounds the active chamber; and a passive valve assembly configured to open in response to a positive pressure and a negative pressure within the active chamber to fluidly couple the active chamber to the inactive chamber and equalize a pressure between the active chamber and the inactive chamber.

An acoustically transparent protector for an audio device provided with a sound generating transducer having a sound port covered by said protector for use with a human ear for the reproduction of sound which allows sound to pass through with little attenuation or distortion but does not allow foreign material such as ear wax, dust, debris, or water to pass into the sound port. The protector of the invention is provided with a sound radiating element having at least a curve portion and a suspension part. The protector of the invention realizes a “perfect” barrier that attenuates the sound entering the audio device as little as possible and does not suffer from significant sound distortions.

Certain embodiments of the disclosure relate to microphone-equipped wearable devices, and more particularly, to wearable devices worn on users' ear. According to certain embodiments of the disclosure, a wearable device comprises a speaker, a microphone, and a housing, the housing includes a protrusion configured to be insertable into a user's ear, a first sound path including a first opening formed through an area of a surface of the protrusion, extending from the first opening in a first length, and including a second opening facing the speaker, and a second sound path including a third opening formed through another area of the surface of the protrusion, extending from the third opening in a second length larger than the first length, and including a fourth opening facing the microphone. Other certain embodiments are also possible.

An acoustic device is described that comprises an acoustic channel extending through its housing and an acoustic valve disposed in the acoustic channel. The acoustic valve is configured to determine a passage of sound through the housing via the acoustic channel. The acoustic valve comprises a deformable shape forming a deformable perimeter of the acoustic channel, and an actuating mechanism configured to exert an actuating force deforming the deformable shape causing the deformable perimeter to move and change the passage of sound.

Various implementations include wearable audio devices with counter-bore port features for maintaining a cover on the port. In certain cases, the wearable audio device includes a port that is integrated into the device frame and acoustically couples one or more acoustic cavities to a distinct volume. The device frame has a counter-bore feature proximate to the port for positioning a metal mesh.

An electronic apparatus may include a loudspeaker that includes an enclosure; a first driver disposed in the enclosure and configured to output a sound based on an input audio signal; a unit accommodator having a hole in which the first driver is disposed, and extending toward an inside of the enclosure; a space forming portion extended from an outer edge of the unit accommodator, surrounding a back of the first driver to form a space with the unit accommodator, and spaced apart from an inner edge of the unit accommodator; a slot forming portion extending from the space forming portion, and having an inner surface spaced apart from an outer surface of the unit accommodator to form a first sound output passage; and a sound absorber disposed at at least one of the outer surface of the unit accommodator and the inner surface of the slot forming portion.

An earphone comprising: a speaker unit which electroacoustic-coverts an audio signal to a sound wave; a microphone unit which acoustic electro-convers a sound wave to an audio signal; and a housing which mounts the speaker unit and the microphone unit in an inside of the housing; wherein the housing defines a first acoustic space at one side of a diaphragm of the speaker unit, arranges the microphone unit at a side of a second acoustic space which is defined at the other side of the diaphragm and does not communicate with the first acoustic space, and includes an opening which communicates a front room space of the microphone unit with an external space, a microphone cover member which defines the front room space with the microphone unit, and a waterproof ventilation member which is mounted on the microphone cover member, covers the microphone cover member so that a waterdrop does not invade to a sound hole of the microphone unit which communicates with the front room space and has ventilation.

The present invention provides a sound producing device comprising: an air pulse generating element and a control unit. The air pulse generating element comprises an air chamber and an actuator. The control unit, configured to generate a driving voltage applied to the actuator of the air pulse generating element, such that the air pulse generating element generates a plurality of air pulses in response to the driving voltage. The plurality of air pulses are at a pulse rate, and the pulse rate of the plurality of air pulses is higher than a maximum audible frequency.