Why my spectrogram have negative values?
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In this figure we have a exponential sine wave and his spectrogram. My question is why the spectrogram have negative values? (from -50 to -150)
採用された回答
Star Strider
2018 年 3 月 10 日
2 投票
Assuming he spectrogram function plots the power spectral density (PSD) in decibels. The values are relative, not negative, amplitudes, so -150 dB corresponds to an amplitude of about 3.2E-8.
その他の回答 (1 件)
Kaiwen Zhao
2020 年 3 月 14 日
1 投票
It's Power/frequency(dB/Hz), using log.
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