51 results about "Noise-cancelling headphones" patented technology

A noise-canceling headphone that cancels external noise with a feedforward system includes a driver unit disposed in a housing, a microphone unit that is outwardly disposed in the housing and collects the external noise, and canceling signal generator that generates a noise-canceling signal having a phase opposite to the noise entering through the headphone. The noise-canceling headphone includes an error detecting microphone unit that detects error noise uncanceled by the feedforward system, and error noise-canceling signal generator that generates an error correction signal to cancel the error noise with a feedback system.

Noise canceling headphones designed so that external noise coming from all directions can be effectively concerned by means of a canceling sound before being heard by a user. These feed-forward noise canceling headphones use noise canceling headphones (10), each of which comprises an air chamber (8) formed from a space that is sealed by a member covering the outer circumference of the housing and provided more outward than a front air chamber (7), and wherein the sound-wave introducing part of a microphone (2) is inside the air chamber (8).

A noise canceling headphone includes a microphone provided in a headphone housing, collecting external sound, a canceling signal generating circuit generating a canceling signal in response to a signal output from the microphone which cancels external sound passing through the housing without being attenuated by a sound insulating characteristic of the headphone, a compensating signal generating circuit generating a compensating signal that compensates for the external sound attenuated by the sound insulating characteristic of the headphone, an adding circuit that adds a musical signal input from the exterior to the compensating signal, and a speaker unit that outputs an output signal from the adding circuit and the canceling signal.

The invention discloses a handheld electronic device and a corresponding anti-noise earphone. The handheld electronic device comprises the components of: a connecting interface which is provided with a first pin, a second pin and a third pin, wherein the first pin is used for transmitting first loudspeaker signals, and the second pin is used for transmitting second loudspeaker signals; a first impedance unit which is electrically connected between the second pin and power voltage; a second impedance unit which is electrically connected between the second pin and a reference level; a voltage supply unit which is electrically connected with the third pin; and a fundamental frequency circuit which is electrically connected with the second pin, the third pin and the voltage supply unit, and is used for determining whether an earphone is electrically connected with the connecting interface according to voltage change on the second pin. The handheld electronic device according to the invention can identify type of the earphone and furthermore can provide an operating power supply which is required by an anti-noise circuit of the anti-noise earphone. Furthermore the anti-noise earphone of the invention does not require any battery.

A headphone section 10 having microphone elements 14 L, 14 R for detecting a sound around the user and signal acoustic transducing elements 15 L, 15 R which function as a sound source for canceling the sound around the user housed in the headphone boxes 13 L, 13 R and a control circuit section 20 that includes a noise canceling headphone together with the headphone section 10 are separately configured. The control circuit section 20 is adjusted in such a manner that variation can be reduced and predetermined frequency characteristics and gain characteristics are achieved at a predetermined frequency. To the headphone section 10 , gain adjusting sections 16 L, 16 R are equipped.

An apparatus and method for powering headphone electronics over a standard audio signal cable without interfering with the normal audio transmission or playback of transmitted audio signals. A software application resides on a cell / smart phone or other mobile device that combines the nominal audio output of such a mobile device, like music or spoken word, with a high frequency audio signal to produce a dual component signal. The high frequency component is decoded and rectified outside of the mobile device, either in a connector or on the structure of the headphones themselves, to produce a direct current (“DC”) that powers the headphones. The music or other audible signal component transferred over the audio cable is decoded in parallel and sent to the headphone speakers for normal playback. The invention provides an alternative power source to headphone electronics such as active noise cancelling headphones over the audio cable.