ANR headphones and headsets
First Claim
1. An ANR headset system for coupling to output of an aircraft radio intercom, the headset comprising:
- ANR circuitry that generates a noise reduction signal for an ANR driver in response to an ANR microphone;
a first input for receiving audio signals from the aircraft radio intercom;
a second input for receiving audio signals from a digital music player;
a wireless transceiver coupled to the ANR circuitry for communicating wirelessly with a mobile telephone;
comparison circuitry within the headset system that compares an intercom output signal from the aircraft radio intercom to a threshold;
decoupling circuitry that electrically decouples the intercom output signal from an input signal path of the ANR circuitry; and
attenuating circuitry coupled to the first input and the second input that selectively attenuates audio signals from the second input when the first input is receiving audio signals from the aircraft radio intercom that exceed the threshold as determined by the comparison circuitry.
1 Assignment
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Accused Products
Abstract
An innovative automatic-noise-reduction headset includes numerous enhancements. For example, one embodiment includes added noise-control circuitry at each of one or more auxiliary inputs to reduce audible hiss in the earcups. Another embodiment includes integrated crossfeed processing circuitry to enhance the spatial imaging of stereo audio perceived by headset users. Still another embodiment provides superior perception of noise cancellation by focusing noise cancelling at midband frequencies, such as 400-800 Hertz, as opposed to just lower frequencies. And another embodiment provides earcups formed of magnesium or a magnesium alloy for improved strength-weight as well as passive noise attenuation in the 400-800 Hertz range.
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Citations
10 Claims
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1. An ANR headset system for coupling to output of an aircraft radio intercom, the headset comprising:
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ANR circuitry that generates a noise reduction signal for an ANR driver in response to an ANR microphone; a first input for receiving audio signals from the aircraft radio intercom; a second input for receiving audio signals from a digital music player; a wireless transceiver coupled to the ANR circuitry for communicating wirelessly with a mobile telephone; comparison circuitry within the headset system that compares an intercom output signal from the aircraft radio intercom to a threshold; decoupling circuitry that electrically decouples the intercom output signal from an input signal path of the ANR circuitry; and attenuating circuitry coupled to the first input and the second input that selectively attenuates audio signals from the second input when the first input is receiving audio signals from the aircraft radio intercom that exceed the threshold as determined by the comparison circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification