Topic 10 Sound Energy Flashcards
Vibrations
Back and forth movements repeated fast
Compression
The process where a material is being pushed in to itself
Rarefractions
In sound waves, the layers of air particles that are spread apart (between compressions)
Sound waves
Vibrations of particles in the air
Hertz
Unit of frequency it’s abbreviation is Hz. One hertz is equal to one vibration every second
Pitch
The home ghmess or lowness of a sound. The pitch that you hear depends on the frequency of the vibrating air
Frequency
Number of vibrations in one second, or the number of wavelengths passing in one second
Wavelength
Distance between two neighbouring crests or troughs of a wave. This is the distance between two particles vibrating in step
Amplitude
Maximum distance that a particle moves away from its undisturbed position
Reverberation
Longer-lasting sound caused by repeated reflection from hard surfaces