23 terms

Honors Physics Chapter 15 Vocabulary

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acoustics
the science and technology oh how sound behaves
beats
the pulsations of sound produced when two similar frequencies interfere with each other
cochlea
a tiny, fluid-filled bone structure in the inner ear that contains the essential organs of hearing
consonance
a harmonious or agreeable combination of frequencies heard when sounds are played simultaneiously
decibel
the dimensionless unit of a logarithmic scale for expressing the relative intensity of sounds
dissonance
an unpleasant combination of frequencies heard when sounds are played simultaneously
Doppler effect
the change in the observed frequency of a wave due to the relative motion of the source and observer
Fourier's theorem
states that nearly every wave can be expressed by superimposing single frequency waves
frequency spectrum
a graphic representation showing the relative contribution to an overall sound made by each component frequency
microphone
a device that transforms sound waves into electrical signals for the purpose of transmitting or recording sound
musical scale
a series of musical notes arranged from low to high in a special pattern
note
a frequency in a musical scale; a sound with a certain duration and pitch; it is based on a single fundamental frequency and may include harmonies and other related frequencies
octave
a frequency difference that is double or half the starting frequency
pitch
the property of a sound determined by the frequency of the waves producing it; the highness or lowness of a sound
pressure
the force exerted per unit area; fluid pressure acts in all directions
reverberation
multiple reflections of sound building up and blending together
rhythm
the organization of a sound into regular time patterns
shock wave
the compressed wave fronts that form in front of a supersonic object; the wavefronts form a boundary between sound and silence
sonogram
a graphic representation of sound showing frequency, time, and intensity
speaker
a device that converts electrical signals into sound; used to reproduce sound accurately
stereo
a method of sound reproduction involving multiple speakers to approximate the spatial distribution of the original sound
subsonic
motion that is slower than the speed of sound in air
supersonic
motion that is faster than the speed of sound in air
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