Calculating a spectral envelope

1. What is a spectral envelope of sound?
2. What do spectral detail and spectral envelope convey in terms of speech information?
3. What is power spectrum of a signal?

What is a spectral envelope of sound?

Spectral envelope is the shape of the power spectrum of sound. It is an important cue for the identification of sound sources such as voices or instruments, and particular classes of sounds such as vowels.

What do spectral detail and spectral envelope convey in terms of speech information?

Spectral envelope and source signature analysis

The spectral envelope conveys sound quality and the time envelope is responsible for speech intelligibility. The spectral envelope can be identified in terms of the poles and zeros according to the linear system theory.

What is power spectrum of a signal?

The power spectrum of a signal indicates the relative magnitudes of the frequency components that combine to make up the signal. The data used to determine the power spectrum must reflect sufficient excitation in the signal.