20 terms

Intro to sound- Joshua Trent

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What are sounds?
Sounds are vibrations that travel though the air or some other medium.
How are sounds measured?
The loudness or intensity of a sound is measured in Decibels (dB).
How is frequency measured?
The frequency of a sound is measured in Hertz (Hz). 1000 Hertz=Kilohertz (kHz)
How far can humans hear?
20 Hz to 20 000 Hz (20 kHz)
What is the crest?
Point that exhibits maximum amount of upward displacement from the rest position.
What is trough?
Point that exhibits maximum amount of downward displacement from the rest position.
What is wave length?
Distance from crest to crest
What is amplitude?
Distance from rest to crest or rest to trough
What is frequency?
Number of waves to pass a point in one second.
What is pitch?
Quality of a sound determined by the rate of vibration. The degree of highness or lowness of a tone.
How do you convert analog to digital sound?
By sampling
What is sampling?
Sampling converts electrical energy to binary code (1's and 0's) that is readable by computers
What is the sample rate?
The rate or frequency at which a sound is sampled to digitize it. Measurements of a sound wave over time measured in Hz (cycles/sec).
What is bit rate?
the number of computer bits that are conveyed or processed per unit of time.
What is waveform?
a visual representation of an audio signal.
What is a clip?
is a short segment of audio. It can be combined with others to make an audio track.
What is a trim?
removes everything from the left and right of selected audio.
What does amplify mean?
change the volume of selected audio.
Which audio format is created by IBM?
WAV
Which audio format is popular for music?
MP3
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