Audio Terminology And Definitions Dictionary
A range of frequencies defined by doubling—or, less frequently, halving—a
particular frequency. The so-called "ten audible octaves" cover the normal
human hearing range from 20 Hz to 20 kHz in the following way. Note that we've
added a description of the musical tones they encompass.
Hz to 40 Hz Low bass
2 40 Hz to 80 Hz Mid bass
3 80 Hz to 160 Hz Upper bass
4 160 Hz to 320 Hz Lower midrange
5 320 Hz to 640 Hz Midrange
6 640 Hz to 1,280 Hz (1.28 kHz) Midrange
7 1,280 Hz to 2,560 Hz (1.28 kHz–2.56 kHz) Upper midrange
8 2,560 Hz to 5,120 Hz (2.56 kHz–5.12 kHz) Lower
9 5,120 Hz to 10,240 Hz (5.12 kHz–10.24 kHz) Mid treble
10 10,240 Hz to 20,480 Hz (10.24 kHz–20.48 kHz) Upper treble
basic unit used to measure electrical resistance. The electrical unit of resistance.
The value of resistance through which a potential difference of one volt will maintain a current of one ampere.
Ohm's Law Stated V=IR, I=V/R, or R=V/I where V is voltage, I is current, and R is resistance.)
(Organic Light Emitting Diode) A relatively new and (as
of this writing) comparatively expensive technology, OLED displays are said to
be brighter, more efficient, and thinner, and they feature better refresh rates,
contrast, and wider viewing angles than either LCD or Plasma.
A loudspeaker's frequency response when measured directly in front of the
One-bit Also known as BitStream, one-bit digital to
analogue conversion is an alternative method to multi-bit D/A conversion developed to improve low
level signal resolution
Optical Soundtrack A
soundtrack that is printed directly on film stock in exactly the same manner as
image frames. It appears as a continuously transparent strip of varying width
against an opaque background. The projector reads the soundtrack with a
photocell placed opposite a light as the film passes between them. Economically
attractive, optical soundtracks first became popular in the early 1930s. (See
also: magnetic soundtrack.)
Output The audio signal exiting a component.
Output Impedance The source impedance an amplifier presents to a loudspeaker. The lower the source
impedance the greater difficulty a loudspeaker will have in feeding Back EMF to the driving amplifier, and the greater the level of control the amplifier will be able to exert over the loudspeaker.