An audio jack may include two contacts to electrically connect to a ground contact of an audio plug in order to detect that a metallic audio plug is inserted into the audio jack. A first of these two contacts may be grounded to form a current return path that generates a ground voltage at the ground contact of the audio plug. The second of these two contacts may be repurposed after the detection to sense the ground voltage. The sensed ground voltage may be added to right and left audio signals. The net voltages provided to the audio plug may be right and left audio signals that include the sensed ground voltage minus the actual ground voltage at the ground contact of the audio plug. This may remove the ground voltage from the net audio output signals, which may reduce crosstalk.

The present invention relates to a pair of pure wireless earphones using optimal monopole antennae in the technical field of communications, comprising in-ear type earphone housings and RF signal generation devices disposed in the in-ear type earphone housings, wherein positioning stages matched with the shape of auricular concha cavities are at the tops of bottom housings; each RF signal generation device consists of an antenna, a main PCB and a battery; each antenna is used for establishing an RF communication link with an audio source and a secondary earpiece; and a ball is drawn with each antenna as a center point and the outer wall of the corresponding in-ear type earphone housing closest to the antenna as a radius to form a space as an antenna holding area in which the antenna is located, and the radius of the ball is greater than 4 mm. When a distance between each antenna and the skin or tissues of a human body is greater than 4 mm, an optimal coupling can be formed therebetween to possibly create an optimal RF creeping wave communication link, the antenna gain and efficiency attenuation of an in-ear type Bluetooth device is within an acceptable range, and the antenna can also maintain a proper RF communication link between a primary earpiece and a mobile phone.

A voice input/output device is connected to a smart device having a voice signal input/output function is provided. A digital voice signal output by the smart device is output to an output unit, (e.g., ear receiver or a speaker), in the form of a voice, and a voice signal transmitted by the smart device is extracted and input to the smart device as a digital voice signal to generate a sound by the smart device itself in addition to an externally generated sound that is input again with improved quality. Accordingly, a voice signal output by the smart device is extracted using a earphone type device having microphone mounted thereon and the voice signal is input to the smart device again.

A media control device is provided. The media control device includes a first output port and a second output port. The media control device receives a user input indicative of disability information of a user. Further, the media control device controls the first output port to output a first audio portion of media content. The media control device further retrieves a second audio portion which describes a first image portion of the media content based on the received user input. The first image portion is associated with the first audio portion. The media control device further controls the second output port to output the first audio portion and the second audio portion based on the received user input.

A noise cancelation device that programs, records, and saves sounds and noises and their respective sound waves, inverts them, and broadcasts the inverted sound waves, thereby reducing, deadening, canceling, or eliminating, the original sounds and noises, and their respective sound waves. Further, the noise cancelation device can save sounds and noises that have a constant, predictable, steady, and recognizable sound quality and their respective sound waves, and preprogram the respective inverted sound waves, which allows for the noise cancelation device to broadcast the preprogrammed inverted sound waves through speakers to reduce, deaden, or cancel the original sounds and noise when they are present. The noise cancelation device is portable and may be used in any location desired, or the noise cancelation device may be is fixed in its location.

In embodiments of an audio control module (318), audio data (310) is received from an audio data source (314) for output to an audio rendering device (316). An initialization input (326) can be received from a wireless audio headset (320) and, responsive to receiving the initialization input, the audio data (328) is communicated to the audio headset. The audio that would be generated from the audio data (322) at the audio rendering device (316) is also limited, such as by replacing the audio data (322) with null audio data, clearing audio data packets from the audio data (322), or by asserting a mute signal (336) to the audio rendering device.

Processes and devices for equalizing an audio system that is adapted to use a loudspeaker to transduce test audio signals into test sounds. The processes and devices can involve the use of infrared signals to convey information in one or both directions between the audio system and a portable computer device that captures test sounds, calculates audio parameters that can be used in the equalization process, and transmits these audio parameters back to the audio system for its use in equalizing audio signals that are played by the audio system.

An audio adaptor and method of communication is provided. The audio adaptor includes a first connector for connecting to a source of audio, a second connector for connecting to a telephone, a third connector for connecting to an audio output device, and a microcontroller. The method involves receiving a first audio signal at a line level from the source of audio, receiving a second audio signal at the line level from a telephone, transmitting the first audio signal and the second audio signal at the line level to an audio output device, attenuating the first audio signal from the line level to a microphone level and transmitting the attenuated first audio signal.

A wireless headset includes a first headset part and a second headset part. The first headset part includes a first earplug, a battery box, and a first part of a cable control box. The first part of the cable control box includes a first interface, a first wireless chip configured to receive and send a wireless signal, and a processor configured to process the wireless signal. The battery box includes a first battery. The second headset part includes a second earplug and a second part of the cable control box, and the second part of the cable control box includes a second interface. The first interface is detachably connected to the second interface. When the first interface is electrically connected to the second interface, a data path is formed between the second earplug and the processor, and the first battery supplies power to the second earplug.

This application relates to methods and apparatus for digital microphones. Disclosed is a digital microphone apparatus (300) for outputting a digital output signal (DATA) at a sample rate defined by a received clock signal (CLK). The apparatus includes a band splitter (302) configured to receive a microphone signal (S.sub.MD) indicative of an output of a microphone transducer and split said microphone signal into first signal path (S.sub.P1) for frequencies in a first band and a second signal path (S.sub.P2) for frequencies in a second band, the frequencies of the second band being higher than the frequencies in the first band. A modulation block (304) is configured to operate on the second signal path to apply a selective gain modulation to signals in the second signal path.