Waves and Energy
Low point of a wave
trough
A change in frequency caused by an object's motion
Doppler effect
A series of organized sound waves with specific pitches that have been deliberately arranged
music
The most dominant sound of a musical note
fundamental
The portion of a wave in which the particles are spread out
rarefaction pulse
An object traveling faster than the speed of sound
supersonic
A random sound with no intended pattern
noise
A musical instrument's distinctive sound quality
timbre
The reinforcement or cancellation that occurs when two or more sound waves meet
interference
The unit usually used to measure sound intensity level
decibel
The difference in pitch between a note and a second note that has twice the frequency of the first note
octave
A situation in which a driving frequency on an object is the same as or nearly the same as one of the object's natural frequencies
resonance
v = wavelength (upside down y) x frequency
speed of a wave
This happens to a wave when it passes between two media
bends toward the medium that causes slower speed
The results when two notes interfere harmoniously
consonance
The set of frequencies at which an object vibrates
natural frequencies
The relationship between the speed of a wave and both frequency and wavelength
directly proportional
v = 331 m/s + (0.61 m/s) (T/1*C)
* = degree
speed of sound
Musical distance between two notes
interval
The frequency relationships between a fundamental and its overtones
harmonic series