Howtosignalprocessing
- How do you read a mel spectrogram?
- What is mel scale in audio?
- What is mel power spectrogram?
- Why is mel scale important?
How do you read a 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 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.
What is mel power spectrogram?
The Mel Spectrogram is the result of the following pipeline: Separate to windows: Sample the input with windows of size n_fft=2048 , making hops of size hop_length=512 each time to sample the next window. Compute FFT (Fast Fourier Transform) for each window to transform from time domain to frequency domain.
Why is mel scale important?
The Mel Scale
We are better at detecting differences in lower frequencies than higher frequencies. For example, we can easily tell the difference between 500 and 1000 Hz, but we will hardly be able to tell a difference between 10,000 and 10,500 Hz, even though the distance between the two pairs are the same.
