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36 Cards in this Set
- Front
- Back
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production
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an impact creates vibration or movement
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propagation
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the vibration creates a disturbance or fluctuations in air pressure these fluctuations generate sound waves which travel through the air
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perception
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when sound waves reach a receiver the changes in pressure are interpreted as sound
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amplitude
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the relative strength of sound wave or how much of change in air pressure occurs
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loudness
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the human perception of amplitude
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decibels (dB)
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unit used to measure the loudness of sound in terms of audio level and signal
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decibel SPL (dB)
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unit to measure the strength of sound in terms of sound pressure levels
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frequency
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what we perceive as the pitch of a sound it's the cycles per second of a sound wave measured in Hertz the faster the rate the higher the frequency
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range of human hearing
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the frequencies that humans are capable of perceiving or hearing 20 Hz to 20kHz
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frequency response
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sensitivity to different frequencies
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1Hz
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1 cycle per second
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1kHz
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1,000 cycles per second
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1MHz
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1,000,000 cycles per second
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1GHz
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1 thousand million cycles per second
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phase
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the relative delay or offset between 2 sound waves of the same frequency
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gain
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adjusts volume
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pan
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adjusts track's stereo position
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AIFF
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audio file format (high quality) developed by Apple
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Wav
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audio file format (high quality) developed by Microsoft
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AUP
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audacity format
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Hertz(Hz)
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unit to measure sound waves cycles per second
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mixing
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combining multiple tracks
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sound
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vibrations that travel through the air
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lossy compression
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compacting a life loss quality
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ambient noise
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background noise
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bit rate
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data transfer rate
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MIDI file
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musical instrument digital interface
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encoder
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rippers pull audio off CD's
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raw audio
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original sound before it's recorded
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algorithm
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detailed set of instructions for a computer
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dynamic range
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the available range of volume between the loudest and softest audible sound this is important in audio because the greater the dynamic range the better
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signal to noise ratio
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the difference in volume between what you want to hear (signal and what you don't want to hear noise
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digital dynamic range
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volume of an audio file (fixed in the file)
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bit depth
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the number of discrete volume levels that create dynamic range
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concatenate
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linking them together
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attenuate
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reduce the amplitude of a signal
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