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Week 3 Hearing Intro
Terms in this set (9)
The Nature of Sound
Sound is caused by changes in air pressure.
These pressure waves are characterised by amplitude, frequency, and phase.
A pure tone (sine wave) is the simplest sound.
Amplitude (decibels: dB)
Loudness also how high the peak of the wave is
Frequency (Hertz: Hz)
Pitch- high or low (how quickly a wave can go through a cycle- one push & one pull)
Lower frequency means lower pitch
Higher frequency means higher pitch
Position within a cycle - 0, 90, 180, 270 degrees then 360 is a full cycle
Human Hearing Range
- 20-20000 Hz
- Most of our auditory experience involves only a small fraction of this range
e.g., typical vocal range: 80-1100 Hz
Can be built up from series of sine waves of varying amplitude, frequency, and phase.
Decomposing complex sounds into their sine wave components by this process
The lowest frequency component of a complex sound
Many complex sounds are made up of this.
Integer multiples of the fundamental
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