18WuD2x

speech clipping • speed of transmission 647
speech input. The resulting signal requires filtering
to remove harmonics generated by the process.
Compare SPEECH COMPRESSION.
speech compression Automatic regulation of the
gain of a speech amplifier to maintain its outputsignal
amplitude against speech-input fluctuations.
Compare SPEECH CLIPPING.
speech compressor A circuit or device, such as an
automatic-gain-control (agc) system, for performing
speech compression. Compare SPEECH CLIP-
PER.
speech digit signaling A method of digital signaling,
where time slots generally used for encoded
audio or video are used alternately for signaling.
speech frequencies See VOICE FREQUENCIES.
speech intelligibility The quality of reproduced
speech that makes it easily understood by a reasonably
proficient user of the language. For good
speech intelligibility, a circuit should transmit
frequencies between 300 Hz and 3000 Hz with
minimal distortion. Increased bandwidth improves
fidelity, but does not provide a significant
increase in intelligibility for normal speech.
speech inverter See SCRAMBLER CIRCUIT.
speech power 1. The alternating-current power in
an electric wave corresponding to speech, as opposed
to that in a sine wave. 2. Sound power in a
speech transmission.
speech recognition The ability of a device to
translate audible spoken words, phrases, or sentences
into binary digital signals that can be used
by machines, such as computers and robots.
speech recognizer An electronic device that translates
audible spoken words, phrases, or sentences
into binary digital signals that can be used
by machines, such as computers and robots.
speech scrambler See SCRAMBLER CIRCUIT.
speech synthesis The ability of a device to translate
binary digital signals from a machine, such
as a computer or robot, into audible, coherent
spoken words, phrases, or sentences.
speech synthesizer An electronic device that
translates binary digital signals from a machine,
such as a computer or robot, into audible, coherent
spoken words, phrases, or sentences.
speed key 1. A semiautomatic key for manual generation
of Morse code characters. 2. A similar,
fully automatic key used especially for highspeed
telegraphy.
speed of light Symbol, c. The speed at which electromagnetic
waves propagate in a vacuum; approximately
299,792 kilometers per second
(186,282 miles per second).
speed of sound The speed at which acoustic waves
propagate. It depends on the nature of the
medium. In air, at ordinary temperatures, it is
approximately 344 meters (1129 feet) per second.
In fresh water, it is approximately 1463 meters
(4800 feet) per second.
speed of transmission The amount of data sent in
a given unit of time. It is generally measured in
Mic.
Phoneme
vocabulary
To computer
or robot
A/D
converter
speech recognizer
Pause
inserter
Inflection
inserter
Phoneme
selector
Optical
character
recognizer
speech synthesizer
Pattern
analyzer
Comparator
Vocabulary
Spkr.
Text
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