Brain and Behaviour PS330 Cheat Sheet (DRAFT) by Varda

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Sound and its properties

- Pressured waves made by vibrating molecu­les­(from compre­ssion and rarefa­ction of air molecules) in which sound energy emitted from a source propag­ates.

- Pure tones - rarely found in nature
- Complex waveforms can be decons­tructed and recons­tructed by Fourier Analysis FA (decom­pos­ition, inverse of FA).
-Power spectrum presents sound energy embedded at various freque­ncies
- Spectr­ogram = how freque­ncies contents vary across time
- animal vocali­zations - highly peropdic elements (tonal and harmonic)
- enviro­mental sound - lack periodic structure