Method and system for controlling noise
AssigneesInnovation Technology, Inc., The Hong Kong Polytechnic University, The Education University of Hong Kong
InventorsYat Sze Choy, Wai Yin Mung, Che Hin Chan, Shun Ming Yuen, Ka Ming Wu, Ho Man Yu, Tak Chun Kwong
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Abstract
A method for controlling noise for a human subject comprise receiving an acoustic signal by the human subject through a headphone, the acoustic signal comprising a noise signal, generating a cancellation signal based on a hearing target curve that is related to acoustic magnitude and frequency, and applying the cancellation signal to the acoustic signal such that the noise signal is attenuated.
Claims17
A method for controlling noise for a human subject, comprising:
- receiving an acoustic signal by the human subject through a headphone, the acoustic signal comprising a noise signal;
- generating a cancellation signal based on a hearing target curve that is related to acoustic magnitude and frequency;
- and
- applying the cancellation signal to the acoustic signal such that the noise signal is attenuated,
- wherein the hearing target curve comprises a relationship between noise attenuation in decibel (dB) and acoustic frequency,
- wherein the method further comprises:
- determining a neutral response for the human subject by performing a power function curve fitting
- y
- i
- =
- a
-
- (
- x
- i
- b
- )
- +
- c
- ,
- where yi is an ith mean perception rating, xi is an ith intensity level, a, b, c are coefficients;
- determining, based on a hearing perception curve, a sound intensity hearing level that corresponds to the neutral response;
- and
- computing the noise attenuation based on a difference between the sound intensity hearing level and a noise level.
A system for controlling noise for a human subject, comprising:
- a headphone configured to receive an acoustic signal;
- and
- a computer device configured to generate a cancellation signal based on a hearing target curve that is related to acoustic magnitude and frequency, and apply the cancellation signal to the acoustic signal such that the noise signal is attenuated,
- wherein the hearing target curve comprises a relationship between noise attenuation in decibel (dB) and acoustic frequency,
- wherein the computer device is further configured to:
- determine a neutral response for the human subject by performing a power function curve fitting
- y
- i
- =
- a
-
- (
- x
- i
- b
- )
- +
- c
- ,
- where yi is an ith mean perception rating, xi is an ith intensity level, a, b, c are coefficients;
- determine, based on a hearing perception curve, a sound intensity hearing level that corresponds to the neutral response;
- and
- compute the noise attenuation based on a difference between the sound intensity hearing level and a noise level.
Dependencies are inferred from the claim text.