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.
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