Unverified50% confidenceFactExact time
The frequency-domain response of a real-valued wavelet is asymmetric, and the positive and negative frequency components interfere with each other, causing oscillation in the energy plot.
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50%
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Long-term
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10/18/2026
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Related Claims
UnverifiedThe frequency-domain asymmetry of real wavelets makes their scalograms prone to oscillation, so they are not suitable for direct instantaneous frequency estimation.78% similarUnverifiedComplex wavelets satisfy the analyticity condition—the frequency-domain response is non-zero only on the positive-frequency side and zero on the negative-frequency side—so that the coefficients of the complex wavelet transform directly constitute an analytic signal, whose modulus is the envelope (amplitude) and whose argument is the instantaneous phase.78% similarUnverified当波纹半波长小于接触区域长度时，唱针无法分辨相邻波峰，输出幅度随频率升高而下降，等效于低通滤波器，这是球形针高频响应不及椭圆针的物理根源70% similar
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