Chapter 1 Flashcards
Vibration
Any form of to and fro motion
Sound
A perceived aural psychological sensation produced by vibration
Sine wave
A graph of the simplest form of vibration showing motion in time/space
Sine tone
The sound produced by sinusoidal vibration or oscillation
Synthesizer
An electronic music instrument that uses select tones, amplifiers and filters to create new musical sounds
Simple harmonic motion definition/perception/graph
Simplest kind of vibration/pure tone/sine wave
Periodic motion
Pendulum repeats motion in equal intervals even though distance traveled gets shorter and shorter
Pendulum motion is fastest where?
At its center point of rest
Pendulum motionless where?
Each extreme
Elasticity
Tendency of a displaced body to return to its point of rest
Momentum
Tendency of a displaced body to overshoot its point of rest
Frequency
Number of cycles in a fixed period of time
Acoustical definition of frequency
Number of sound waves passing a given point in one second
Frequency is measured in
Hertz (Hz)
Resonant frequency
Frequency at which a body tends to vibrate due to its natural characteristics of size, shape, molecular composition, and the stress the body is under
Pitch
Our perception of frequency
The greater the frequency the (higher/lower) the perceived pitch
higher
Amplitude
The distance through which a vibrating body moves. i.e. the amount of displacement of a vibrating body
Loudness
Our perception of amplitude
The greater the amplitude the (louder/softer) the perceived sound
louder
(T/F) Humans do not perceive sound equally well at all frequencies
True
Average range of human sound perception
20 Hz-20,000 Hz
Hearing loss
The inability to perceive certain frequencies and amplitudes which are within the common limits of perception
Cent
One hundredth of a chromatic semitone
