Transcript Glossary
Intermediate 1 Physics Sound and Music Glossary amplifier to frequency hertz to noise pollution octave to speed trace to vibration voltage gain to volume Beath High School - Int 1 Physics 1 amplifier to frequency amplifier a device which turns a small amplitude electrical signal into a larger amplitude signal amplitude a measure of the energy of the wave decibels (dB) the units used to measure the loudness of a sound emitted signals or energy sent out from the source frequency the number of waves or vibrations in one second Beath High School - Int 1 Physics 2 hertz to noise pollution hertz the unit of frequency laser a concentrated source of light made up of only one colour loudspeaker changes electrical energy into sound energy microphone changes sound energy into electrical energy noise pollution unacceptable levels of unwanted sound Beath High School - Int 1 Physics 3 octave to speed octave a sound which is twice the frequency of another is said to be one octave higher pitch how high or low a sound is sonar apparatus emitting high frequency sounds used by ships and fishermen to locate objects underwater sound level how loud a sound or noise is speed how fast energy travels from one place to another Beath High School - Int 1 Physics 4 trace to vibration trace line or wave seen on an oscilloscope (CRO) tuning fork two pronged metal fork used to make a sound of a single frequency ultrasound a sound of frequency greater than 20000 Hz, a sound above the range of human hearing vacuum an area of space where there are no particles of any type present vibration rapid to-and- fro motion Beath High School - Int 1 Physics 5 voltage gain to volume voltage gain volume how much bigger the output voltage of an amplifier is than the input voltage: voltage gain = output voltage/ input voltage how loud a sound is Beath High School - Int 1 Physics 6 Intermediate 1 Physics Sound and Music End of Glossary Beath High School - Int 1 Physics 7