Time domain digit weighting method for non-stable noise signals
A non-stationary noise and signal technology, applied in the measurement of ultrasonic/sonic/infrasonic waves, measurement devices, instruments, etc., can solve problems such as large amount of calculation, inability to obtain sound-weighted time-domain fluctuation signals, calculation errors, etc.
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[0035] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.
[0036] like figure 1 , figure 2 Shown, the time-domain digital weighting method of non-stationary noise signal of the present invention, comprises the following steps:
[0037] 1) With the set acquisition frequency f s Collect the non-stationary noise signal to obtain the non-stationary noise digital signal p(τ);
[0038] 2) Construct the weighted amplitude curve A(f) according to the octave sound level correction value of the noise weighting network, where the octave sound level correction value of the noise weighting network is ΔL w [f c (i)], f c (i) is Oc The center frequency of the i-th subband in the class octave band, i=1,2,....N, the construction formula...
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