Hall objective sound quality parameter measurement method and system based on pulse response noise reduction

An impulse response and measurement method technology, applied in speech analysis, instruments, etc., can solve problems such as errors in the measurement results of objective sound quality parameters in halls, and achieve the effect of avoiding excessive load and additional pulses, avoiding additional pulse interference, and reducing measurement errors.

Pending Publication Date: 2022-07-22
TONGJI UNIV +1
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Problems solved by technology

[0004] The object of the present invention is to provide a method and system for measuring objective sound quality parameters of halls based on impulse response noise reduction, so as to solve the problem that the measurement results of objective sound quality parameters of halls have relatively large errors when the background noise is relatively large

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  • Hall objective sound quality parameter measurement method and system based on pulse response noise reduction
  • Hall objective sound quality parameter measurement method and system based on pulse response noise reduction
  • Hall objective sound quality parameter measurement method and system based on pulse response noise reduction

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Effect test

Embodiment 1

[0069] The invention provides a method for measuring objective sound quality parameters in halls based on impulse response noise reduction. figure 1 The flow chart of the method for measuring objective sound quality parameters in halls provided by the present invention, such as figure 1 As shown, the method includes:

[0070] Step S1: Weighting the frequency sweep signal of equal amplitude to generate a weighted frequency sweep signal.

[0071] Step S2: Generate a frequency sweep sound signal based on the weighted frequency sweep signal, and send the frequency sweep sound signal to the interior of the room under test.

[0072] Step S3: Acquire the acoustic signal at the sound measuring point in the room under test and convert it into a corresponding sound pressure signal.

[0073] Step S4: Generate a corresponding energy impulse response signal based on the sound pressure signal, and perform truncation and noise reduction processing on the energy impulse response signal.

...

Embodiment 2

[0117] The invention also provides a hall objective sound quality parameter measurement system based on impulse response noise reduction, figure 2 The structure diagram of the hall objective sound quality parameter measurement system provided by the present invention, such as figure 2 As shown, the system includes:

[0118] The signal generation module 1 is used for weighting the frequency sweep signal of equal amplitude to generate the weighted frequency sweep signal.

[0119] The signal transmitting module 2 is connected to the signal generating module 1, and is placed inside the room under test, for generating a frequency sweep sound signal based on the weighted frequency sweep signal, and sending the frequency sweep sound signal to the room under test internal.

[0120] The signal acquisition module 3 is arranged at the sound measuring point inside the room under test, and is used for collecting the sound signal at the sound measuring point in the room under test and c...

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Abstract

The invention discloses a hall objective sound quality parameter measurement method and system based on pulse response noise reduction, and relates to the technical field of architectural acoustic measurement. According to the method, the amplitude of the frequency sweep signal is gradually increased at the head and gradually reduced at the tail by weighting the equal-amplitude frequency sweep signal, so that overlarge load and additional pulse caused by sudden change of the amplitude of the frequency sweep signal are avoided, and pulse response without tail pulse interference and with higher precision is obtained; the energy pulse response signals are cut off, so that the interference of the energy pulse response signals of which the head part and the tail part mainly comprise noise on the calculation precision is avoided, and the accuracy of a measurement result is improved; by performing noise reduction and truncated energy compensation processing on the energy pulse response signal, the noise in the signal is prevented from influencing the calculation precision of the objective tone quality parameter, so that the processed energy pulse response signal has a good signal-to-noise ratio under the condition that the background noise is relatively large, the measurement error is reduced, and the measurement accuracy is improved. And the accuracy of objective tone quality parameter measurement results is improved.

Description

technical field [0001] The invention relates to the technical field of architectural acoustics measurement, in particular to a method and system for measuring objective sound quality parameters of halls based on impulse response noise reduction. Background technique [0002] The function of the hall objective sound quality parameter is to describe the hall sound quality. The measurement results of the objective sound quality parameters of the halls are an important basis for the sound quality acceptance work of various halls such as concert halls, theaters, conference halls, and gymnasiums. All the objective sound quality parameters can be obtained from the indoor impulse response, so the accurate measurement of the impulse response is the key technology to measure the objective sound quality parameters. [0003] At present, the impulse response applied by the domestic sound quality parameter measurement equipment basically adopts various digital signal technologies, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/60G10L25/21G10L21/0216
CPCG10L25/60G10L25/21G10L21/0216
Inventor 刘海生周庆丽
Owner TONGJI UNIV
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