CSD 230 Exam 1 Flashcards
Acoustics
Science of sound
Amplitude
Amount of vibration of a mass from the position of rest the farthest point from
the position of rest (up and down on chart)
Condensation
Region of a sound wave characterized by an increased density of molecules
Opposite of rarefaction
Damping
Decrease in the amplitude of a vibrating body over time
Decibel (dB)
Unit of sound intensity level
The logarithm of the pressure of a sound to a reference pressure (usually
0.0002 dynes/cm2)
Frequency
Number of complete cycles (or oscillations) of a vibrating body in a specified unit of time
Hertz (Hz)
Intensity
Magnitude of sound energy per unit area
Similar to volume
Force of a sound wave
Pitch
The psychological perception of frequency
Pure Tone
Single-frequency tonal sound
Aka a sinusoid
Refraction
Region of a sound wave characterized by an area of less dense molecules
Opposite of condensation
Resonance
Natural rate of vibration of a mass
Shatter a glass with a musical tone
Sound
Vibration through a medium (air/liquid)
Primary sections of the ear
outer, middle, inner, retrocochlear
Peripheral
Central
Outer ear
* Middle ear
* Inner ear
* CN (8)
* Cochlear nucleus on the brainstem
- Rest of the brainstem
- Cortex
Hearing Threshold
Softest intensity at which one can hear a sound
Frequency dependent