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Digital Media: Sound Quiz
Terms in this set (53)
Vibrations that travel through the air or another medium and can be heard when they reach a person/animal's ear.
As light is to vision, air pressure is to ____.
aka sound pressure wave
a wave caused by a vibration that results in slight variations in air pressure, which we hear as sound.
a graph of air pressure fluctuation.
Converted into voltage to electrify sound.
the unit of measurement for electrical current.
a device that increases the level or amplitude of an electrical signal, making the resulting sound louder.
the height of a waveform above or below the zero line. In audio, this usually translates to the signal strength or the volume of the sound.
What does loudness depend on?
the amplitude of vibration
What does pitch depend on?
What does quality of timbre depend on?
converts sound to an analog electrical signal, then an analog-to-digital converted (ADC) converts the analog signal into a digital signal.
The digital signal can then be recorded, edited, and modifies using digital audio tools.
A transducer which converts sound pressure waves into electrical signals.
When using headphones...
a digital-to-analog converter will convert a digital signal back into an analog signal, which analog circuits amplify and send to a loudspeaker.
the ratio (in dB) between the loudest peak and the softest level of a song or recording
the ratio (in dB) between the softest and loudest possible levels a device or system can provide without distortion.
An audio signal processor that uses one or more filters to boost or cut the amplitude (volume) of certain frequencies within the sound. The underlying principle is to balance or "equalize" the frequency response of the audio system, or to create balance between multiple signals in a sonic space.
Audio engineers may use this to alter or "color" the sound in many different ways.
Happens when sound waves are absorbed by a surface (as opposed to bouncing off the surface - reflection).
the science of sound, specifically the science of the properties and behavior of sound waves.
analog to digital conversion
digital to analog conversion
Attack, Decay, Sustain, Release.
The four stages of volume change in a sound event.
___ controls are particularly useful on a synthesizer instrument.
The initiation of a sound.
The point where the sound begins and increases in volume to its peak.
The gradual reduction in volume after a song reach it's peak in the attack stage.
The part of the sound that holds at approximately the same volume after the initial attack and drop in volume level (decay), until the sound stops playing.
The rate at which the volume drops to zero as the sound stops playing
The collective term for the four elements of the lifespans of a sound (ASDR).
Describes how a sound or audio signal varies in intensity over a period of time.
The part of the sound that comes from the surrounding environment rather than directly from the sound source.
A continuously variable quantity. In the context of audio, this refers to using continuously
changing electrical signals (voltage) to represent the continuously variable frequencies of sound,
and/or recording those signals to an ____ medium.
A recording of the continuous changes of an audio waveform. The most
common example of _____ recording in a recording studio is recording on reel-to-reel magnetic tape
The range of frequencies we humans can hear with our ears.
The transmission, recording, or reproduction of sound, whether digitally, electrically, or acoustically.
The usable frequency range of a communication channel, measured by the difference between the device's highest and lowest usable frequencies.
the ratio measurement of two levels according to a scale where a certain percentage change compromises one unit.
Most often used to describe audio levels.
The part of the microphone that moves in response to sound waves, converting them to electrical signals.
Digital audio workstation (DAW)
a device or computer software that records and mixes audio digitally and creates digital audio files.
Can be a standalone unit or an integrated set of components, today usually found as "in-the-box" software programs run from a computer.
Most common ___ program found in recording studios is Pro Tools, others are Reason, Ableton, and Logic.
Digital (data) Compression
a method of reducing the number of bits (zeroes and ones) in a digital signal by using mathematical algorithms to eliminate redundant information.
The number of occurrences of a particular event within a certain amount of time.
Specifically refers to the number of complete cycles a vibration or waveform makes in a second, measured in cycles per second, or Hertz (Hz).
Determines what we hear as pitch. The longer the wavelength, the fewer the cycles per second, and the lower the pitch.
Any unpleasant, objectionable, or unintended sound frequencies present in a sound signal
All electronic equipment produces some type of ______, which may be described as a
hiss or buzz that can be heard during quiet or otherwise silent passages. Bad connections, improper
grounding, radio interference and other issues can also cause introduce _____ into the signal.
Engineers may also deliberately run a _____ signal through a sound system for testing purposes.
any number of processes to remove noise from a signal, device, or system.
An interval or difference of pitch of 12 half-steps.
In our standard tuning system, the higher note in an ____ is exactly double the frequency of the lower note.
In microhpones, picking up evenly from all directions (sometimes called "Nondirectional")
In speakers, sending out the signal evenly in all directions.
A microphone pick-up pattern which is more sensitive to sound arriving from one direction than from any other.
1. The perception of frequency by the ear (a higher or lower tone of music)
2. A control on a tape transport which adjusts the speed slightly up or down, changing the pitch and time of the music.
The study of how humans perceive and respond to sound, not just in the context of interpreting the physical sound waves, but also taking psychological and emotional factors into account.
Helpful to audio engineers in understanding how the brain interprets various sounds and frequencies.
1.In digital music, the process of adjusting the rhythmic performance of music by moving the notes to precise location on the time line, effectively "rounding" the note occurrences to the nearest defined increment.
2.In analog-to-digital conversion, the use of the same mathematical _____ principles to convert an analog signal into a smaller set of steps (a digital quantity).
Quantization Distortion/Quantization Error
The effective "error in translation" between an
analog signal and its sampled counterpart due to the rounding of a large number of analog values to
the nearest digital quantity. This often results in additional random frequencies in the sound, often
heard as noise.)
the bouncing of sound waves off a flat surface, as opposed to absorption.
Can have a great impact in how we perceive collective sound.
Often perceived as an echo.
The action or function of shuttling a piece of recorded audio back and forth while monitoring it, typically to locate a certain point in the recording.
1. In audio, an alternating current/voltage matching the waveform of, or being originally obtained from, a sound pressure wave.
2. Also in audio, an alternating current/voltage between 20Hz and 20,000Hz.
3. A digital audio bit stream.
The practice of altering the character or sound of an audio signal through a variety of devices or plug-ins, such as equalizers, compressors, reverb units, etc.
The waveform of a "pure tone" - a sound vibrating at a single frequency. Depicted graphically, a ____ is a smooth, oscillating curve.
A device that converts electrical signals to sound; more technically, a transducer that changes an electrical audio signal into sound pressure waves.
The sound quality that makes one instrument sound different from other instruments, even while playing the same pitch.
Largely shaped through the presence, absence, and complexity of harmonies when the instrument is played.
1. Any single frequency signal or sound
2. The sound quality of an instrument's sound relative to the amount of energy present at different frequencies.
a common, non-technical term that either refers to sound pressure level( which we hear as loudness) or to audio voltage level.
A visual representation or graphic of a sound wave, audio signal, or other type of wave, showing the wave's oscillations above and below the zero line.
The physical length of one cycle of a wave, measured in feet, inches, etc. The longer the wavelength of a sound wave, the lower its frequency; the shorter the wavelength, the higher the frequency
A covering that fits over a microphone to reduce the excessive noise resulting from wind blowing into the mic. Typically used for recording in outdoor locations.
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