Add noise/signal to mel log spectrogram

1. What is a log Mel spectrogram?
2. What is log magnitude spectrogram?
3. What is mel scale in audio?
4. Why are spectrograms important?

What is a log Mel spectrogram?

A mel spectrogram logarithmically renders frequencies above a certain threshold (the corner frequency). For example, in the linearly scaled spectrogram, the vertical space between 1,000 and 2,000Hz is half of the vertical space between 2,000Hz and 4,000Hz.

What is log magnitude spectrogram?

The log-magnitude spectrogram is defined as the logarithmically scaled magnitude spectrum of a signal across time. The advantage of the log-magnitude spectrogram is that it shows how the energy distribution evolves.

What is mel scale in audio?

The mel scale is a scale of pitches judged by listeners to be equal in distance one from another. The reference point between this scale and normal frequency measurement is defined by equating a 1000 Hz tone, 40 dB above the listener's threshold, with a pitch of 1000 mels.

Why are spectrograms important?

In the seismic world, spectrograms are increasingly being used to look at frequency content of continuous signals recorded by individual or groups of seismometers to help distinguish and characterize different types of earthquakes or other vibrations in the earth.