Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
Binary Numeral System
|
language used by computers with '0' and '1' or 'on' and off'
|
|
|
bits
|
a number used in a digital information system
|
|
|
byte
|
a binary word that it 8 bits long
kilobyte=1024 bits megabyte= one million bits gigabyte=1,000 megabytes Terabyte=1,000 gigs |
|
|
sound (SPL)
|
sound is pressure
SPL= sound pressure level (volume) |
|
|
sound wave
|
like a rock thrown into a pool, measured in amplitude
RMS means average amplitude |
|
|
dynamic range of sound
|
the difference between the strongest (loudest) and weakest (softest) part of the signal that can be heard
|
|
|
Amplitude (loudness)
|
measured in dB of SPL sound pressure levels
How TALL the wave is |
|
|
Oscillation
Period |
one full cycle of the wave
the time it takes for one full cycle |
|
|
dB/ SPL
|
describes the loudnes we can HEAR
|
|
|
dBFS
|
fullscale, used in protools to measure the maximum available level
|
|
|
dBu
|
measures electricity of the signal (like a mike)
|
|
|
doubling loudness
|
add 10 dB will make it seems twice as loud
|
|
|
85 dB
|
mix at 85 dB humans hear best at this level
(sound class was 90) |
|
|
frequency
|
the number of cycles per second
the more cycles, the higher the pitch |
|
|
hertz
kilo hz khz |
same as cycles per second
short for 1000 hz |
|
|
human hearing
|
20 Hz-20kHz
|
|
|
bandwidth
|
a range of frequencies from low to high
|
|
|
doubling the frequency
|
you hear it one octave higher
( c to c) |
|
|
harmonics (overtones)
|
multiples of the fundamental
(440- 880, +440= 1320 etc) |
|
|
phase cancellation
|
when sound waves knock each other out
|
|
|
sample
|
digitally recorded piece of audio (not anaolg)
|
|
|
A/D converter
|
analog/digital converter turns a signal into sample rate and bit depth
|
|
|
sample rate
|
the number of samples per second taken of an audio signal (snapshots)
|
|
|
Nyquist theorem
|
the best sample rate is TWICE the the highest frequency
20hz twice= 44.1 khz |
|
|
bit depth
|
the number of loudness/volume levels in a sample, the higher the number, the better the sample
|
|
|
dither
|
a way of making the signal better by boosting the signal into the first bits
|
