Invention Grant
- Patent Title: Headphones with distortion-free loudness limiting and dynamic equalization device
- Patent Title (中): 耳机具有无失真的响度限制和动态均衡装置
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Application No.: US12932050Application Date: 2011-02-15
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Publication No.: US08699720B2Publication Date: 2014-04-15
- Inventor: Walter Ka Wai Chu
- Applicant: Walter Ka Wai Chu
- Agency: David and Raymond Patent Firm
- Agent Raymond Y. Chan
- Main IPC: H04R1/10
- IPC: H04R1/10
Abstract:
A headphone assembly for generating an audio output with distortion-free loudness limiting and dynamic equalization feature includes a voltage divider comprising a positive temperature coefficient resistor and a headphone driver, and two audio signal input terminals in each audio channel connected to the voltage divider arranged for connecting to an audio device, wherein a large portion of the voltage of the audio signal to the two audio signal input terminals to appear across the headphone driver in response to the audio signal received through the two audio signal input terminals below a preset low amplitude level; and increasing a resistance of the positive temperature coefficient resistor in a preset non-linear manner and decreasing a voltage drop across the headphone driver accordingly in response to the audio signal received through the two audio signal input terminals which is higher than the preset low amplitude level.
Public/Granted literature
- US20110200203A1 Headphones with distortion-free loudness limiting and dynamic equalization device Public/Granted day:2011-08-18
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