Links to related material and teachers' resources  
Frequency and Pitch
Logarithmic dependence. Octaves a musical intervals. Range of the ear in frequency and wavelength. Infrasound and ultrasound
Impedance and intensity
Particle velocity, acoustic flow, acoustic impedance and specific acoustic impedance. Instantaneous and average intensity and power. RMS values.

What is a decibel?
Decibels, logarithmic scales, sound files and examples. Psychophysical measures: phons and sones. A and C weighting filters (dBA, dBC, dBlin). Recording levels. Intensity radiation and impedance. Examples.

Hearing Sensitivity
An on-line test of your own hearing sensitivity as a function of frequency. ISO standards 

Timbre - spectrum
Synthesising and analysing harmonic tones. Timbre depends somewhat on the spectral components of a sound. Examples

Timbre - envelope
Timbre depends very strongly on the time variation in a sound. Amplitude envelope and examples

Acoustic compliance, inertance and impedance
Acoustically compact regions in which inertia dominates (inertance) or compressibility dominates (compliance). The characteristic impedance of a duct.
Downloads (thumbnails at 50% of size of animation)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)
Download (mp4 video)
Download (original flash file)