I recently completed an audiobook using Audacity, which I have enjoyed using for two years. Before submitting the audiobook to the publisher I utilized noise reduction, loudness normilization, deesser, declicker, limiter and freq. EQ. When I checked it for ACX standards, it met them all, but the publisher emailed me after receiving the chapters that there was noticeable White Noise at the beginning of some chapters. When I reviewed the chapters in questions, there was zero noise reading on the Audacity VU meter, and I could not hear any noise. However, I suffer from some high frequency hearing loss. I was able to replace the sections in chapter with other quiet sections in the recording, but I wonder why I could neither hear nor see the white noise, which the publisher says he could hear with both his versions of Audacity and on VLC media player.
It’s probably too low to show-up on the meter and you may not hear it under “normal” listening conditions. The spec of -60dB is very quiet. Try ACX Check
Audible noise will show up on the spectrogram, even when not conspicuous in waveform …
https://manual.audacityteam.org/man/multi_view.html
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