Abstract: A sound providing method using an earphone set and an earphone set are provided. The sound providing method using the earphone set includes simultaneously providing a first sound wave to a left ear of a user by using a left ear earphone of an earphone set and a second sound wave to a right ear of the user by using a right ear earphone of the earphone set. There is a frequency difference between a first frequency of the first sound wave and a second frequency of the second sound wave. The frequency difference automatically and cyclically changes along with time.

Abstract: A brain wave induction method is provided. In the method, a first sound wave to a left ear of a user and a second sound wave to a right ear of the user are simultaneously provided. There is a frequency difference between a first frequency of the first sound wave and a second frequency of the second sound wave. The frequency difference is automatically changed along with time.

Abstract: A pair of audio glasses and an audio device are provided. The pair of audio glasses includes a glasses body. The glasses body has a wireless transmission device, a first connector and an audio processor. The audio processor is electrically connected to the wireless transmission device and the first connector. The audio device includes a main body. The main body is configured to be assembled to a glasses and has a wireless transmission device, a first connector and an audio processor. The audio processor is electrically connected to the wireless transmission device and the first connector.

Abstract: A surgical audio and video collection device includes a processor, a video camera and a skin-touch vibration pickup. The video camera electrically connected to the processor is used to be worn on the body of the surgical operator and record video. The skin-touch vibration pickup is used to be attached on the skin of the surgical operator and sense the vibration of the skin to pick up the sound. The skin-touch vibration pickup is signally connected to the processor to transmit voice message to the processor. The voice message includes at least one of voice commands for controlling the video camera and voice tags for being added to the video recorded by the video camera.

Abstract: A speaker unit with dual diaphragms and dual coils includes a casing, first and second magnetic members, and first and second vibration systems. The casing has a chamber. The first and second magnetic members are disposed in the chamber. The first vibration system includes a first diaphragm fixed on the casing and located in the chamber, and a first coil fixed on the first diaphragm and located beside the first magnetic member. The first diaphragm has a ring shape. An orthogonal projection of the second magnetic member on an inner bottom surface of the casing is completely located in an orthogonal projection of a central opening of the first diaphragm on the inner bottom surface. The second vibration system includes a second diaphragm fixed on the casing and located in the chamber, and a second coil fixed on the second diaphragm and located beside the second magnetic element.

Abstract: A speaker unit with dual diaphragms and dual coils includes a casing, first and second magnetic members, and first and second vibration systems. The casing has a chamber. The first and second magnetic members are disposed in the chamber. The first vibration system includes a first diaphragm fixed on the casing and located in the chamber, and a first coil fixed on the first diaphragm and located beside the first magnetic member. The first diaphragm has a ring shape. An orthogonal projection of the second magnetic member on an inner bottom surface of the casing is completely located in an orthogonal projection of a central opening of the first diaphragm on the inner bottom surface. The second vibration system includes a second diaphragm fixed on the casing and located in the chamber, and a second coil fixed on the second diaphragm and located beside the second magnetic element.

Abstract: A speaker unit with microphone is provided. The speaker unit includes a housing, a cover, a vibration element and a microphone. The cover is assembled to the housing and forms a chamber with the housing. The cover has at least one audio hole. The vibration element is disposed in the chamber for generating sound toward the cover. The microphone is fixed on the cover and outside the chamber.

Abstract: A speaker unit with microphone is provided. The speaker unit includes a housing, a cover, a vibration element and a microphone. The cover is assembled to the housing and forms a chamber with the housing. The cover has at least one audio hole. The vibration element is disposed in the chamber for generating sound toward the cover. The microphone is fixed on the cover and outside the chamber.

Abstract: An in-ear microphone with active noise control is provided, including a housing, a speaker unit and a microphone module. The housing includes an air hole and a sound outlet. The speaker unit is disposed in the housing, and separates a space in the housing into a front chamber and a rear chamber. The microphone module is at least partially located in the front chamber and between the sound outlet and the speaker unit. The air hole is in communication with the sound outlet through the front chamber. The microphone module is configured to receive sound of a user and ambient sound.

Abstract: An in-ear microphone with active noise control is provided, including a housing, a speaker unit and a microphone module. The housing includes an air hole and a sound outlet. The speaker unit is disposed in the housing, and separates a space in the housing into a front chamber and a rear chamber. The microphone module is at least partially located in the front chamber and between the sound outlet and the speaker unit. The air hole is in communication with the sound outlet through the front chamber. The microphone module is configured to receive sound of a user and ambient sound.

Abstract: A planar speaker unit including a housing, a first magnet set, and a diaphragm is provided. The housing has an accommodating space and a bottom wall. The first magnet set is disposed on the bottom wall and located in the accommodating space. The diaphragm is disposed in the accommodating space and located above the first magnet set. The diaphragm includes a substrate and a planar coil. The planar coil is flatly attached on the substrate. The maximum vibration amplitude of the diaphragm is smaller than the minimum distance between the diaphragm and the first magnet set. The diaphragm is tension-free.

Abstract: An in-ear earphone including a housing, a speaker unit and an earpad is provided. The housing has a tube portion. The speaker unit is disposed inside the tube portion. The earpad has a connecting portion and a wrapping portion connected to the connecting portion. The connecting portion is assembled to an audio outlet end of the tube portion. The connecting portion and the speaker unit are surrounded and wrapped by the wrapping portion. Only the tube portion exists between an annular sidewall of the speaker unit and the wrapping portion.

Abstract: A circumaural earphone adapted to be worn on a head of a user is provided. The circumaural earphone includes a main frame, two adjusting modules and two earphone cups. The two adjusting modules are connected to two opposite ends of the main frame respectively. The two earphone cups are connected to the two adjusting modules respectively. Each of the adjusting modules is rotated to drive the corresponding earphone cup to move close to or away from the head of the user so as to adjust a clamping force applied to the head of the user by the two earphone cups.

Abstract: An in-ear earphone including a housing, a speaker unit and an earpad is provided. The housing has a tube portion. The speaker unit is disposed inside the tube portion. The earpad has a connecting portion and a wrapping portion connected to the connecting portion. The connecting portion is assembled to an audio outlet end of the tube portion. The connecting portion and the speaker unit are surrounded and wrapped by the wrapping portion. Only the tube portion exists between an annular sidewall of the speaker unit and the wrapping portion.

Abstract: An in-ear headset module including a housing, an earpad, a speaker unit and a microphone is provided. The housing has a chamber and an audio outlet communicated with the chamber. The earpad is disposed outside the housing. The speaker unit and the microphone are disposed in the chamber, and the microphone is located between the speaker unit and the audio outlet. The diameter of the microphone is smaller than or equal to 6 mm.

Abstract: An in-ear headset module including a housing, an earpad, a speaker unit and a microphone is provided. The housing has a chamber and an audio outlet communicated with the chamber. The earpad is disposed outside the housing. The speaker unit and the microphone are disposed in the chamber, and the microphone is located between the speaker unit and the audio outlet. The diameter of the microphone is smaller than or equal to 6 mm.

Abstract: A circumaural earphone adapted to be worn on a head of a user is provided. The circumaural earphone includes a main frame, two adjusting modules and two earphone cups. The two adjusting modules are connected to two opposite ends of the main frame respectively. The two earphone cups are connected to the two adjusting modules respectively. Each of the adjusting modules is rotated to drive the corresponding earphone cup to move close to or away from the head of the user so as to adjust a clamping force applied to the head of the user by the two earphone cups.

Abstract: A circumaural earphone and a decorating strap thereof are provided. The circumaural earphone includes two earphone cups, a main strap, a decorating strap, a photosensitive switch, a power supplier and a light emitter. Two ends of the main strap are connected with the two earphone cups. Two ends of the decorating strap are detachably connected with the two earphone cups or the main strap. The photosensitive switch is disposed in one of the two earphone cups, the main strap or the decorating strap. The power supplier is disposed in one of the two earphone cups, the main strap or the decorating strap. The light emitter is disposed in the decorating strap and electrically connected with the power supplier through the photosensitive switch.

Abstract: An earphone including a housing, a bracket, a first speaker unit and a second speaker unit is provided. The bracket disposed inside the housing includes a front plate, a first tube portion, a second tube portion and at least one connecting portion. The first tube portion is connected to the front plate. The second tube portion is separated from the first tube portion. The first tube portion is between the front plate and the second tube portion. The connecting portion connects the first tube portion and the second tube portion. The front plate has a central hole and surrounding holes. The second accommodating space is communicated to a main audio-output path of the housing through the surrounding holes. The first speaker unit is disposed in a first accommodating space of the first tube portion. The second speaker unit is disposed in a second accommodating space of the second tube portion.