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(A - C) (D - G) (H - L) (M - Q) (R - U) (V - Z)

V - Z

Vacuum tube (18)

An amplifying device in which electrons from a hot cathode tube flow through one or more grids before reaching a plate.

Vacuum tube (26)

A device consisting of a glass shell from which air is removed (or replaced by inert gases) in which electrons flow from a cathode to an anode, possibly controlled by a grid or other elements.

VCA (voltage-controlled amplifier) (27)

An amplifier whose gain varies linearly or exponentially in proportion to a control voltage.

VCF (voltage-controlled filter) (27)

A filter whose cutoff frequency (or center frequency and bandwidth) varies linearly or exponentially in proportion to one or more control voltages.

VCO (voltage-controlled oscillator) (27)

An oscillator whose frequency varies linearly or exponentially in proportion to one or more control voltages.

Velocity microphone (20)

A microphone that responds to particle velocity rather than to sound pressure.

Vibrato (07)

Tonal effect in music resulting from periodic variation of amplitude, frequency, and/or phase.

Vibrato (13)

Frequency modulation (FM) that may or may not have amplitude modulation (AM) associated with it. Some musicians speak of intensity vibrato, pitch vibrato, and timbre vibrato as separate entities; others understand vibrato to include all three. Sometimes the term tremolo is used to describe AM, but this is not recommended because tremolo is used to describe other things, such as rapid reiteration of a note or even a trill.

Viol (10)

An early bowed string instrument usually having six strings and a fretted fingerboard.

Viola da gamba (10)

A viol played in an upright position.

Virginal (14)

A small plucked string instrument in which the string run parallel to the keyboard.

Virtual acoustics (29)

Simulated acoustics that support the auditory aspect of virtual reality.

Virtual pitch (07)

Subjective pitch created by two or more partials in a complex tone (two examples are the “missing fundamental” of a filtered tone and the strike note of a bell).

Virtual reality (29)

Computer-based simulation of the real world by perceptual means intended to minimize the apparent artificial nature of those means.

Vital capacity (17)

The volume of air that can be moved in and out of the lungs with maximum effort during inhalation and exhalation.

Vocal cords (15)

Folds of ligament extending across the larynx that interrupt the flow of air to produce sound.

Vocal folds (15)

Folds of ligament extending across the larynx that interrupt the flow of air to produce sound.

Vocal fry (17)

Loose glottal closure that allows air to bubble through with a frying-pan sound.

Vocal tract (17)

The tube connecting the larynx to the mouth consisting of the pharynx and the oral cavity.

Vocalis muscle (17)

The thyroarytenoid muscle.

Vocoder (16)

A combined speech analyzer and synthesizer (“voice coder”).

Vocoder (29)

An abbreviation meaning voice coder, based on the analysis of speech sounds into many simultaneous frequency spaced channels of information, with the information in each channel typically much simpler than the analyzed sound.

Voiceprints (16)

Speech spectrogram from which a speaker’s identity may be determined.

Voicing (14)

Adjusting organ pipes to have the desired sound.

Voix celeste (14)

An organ stop that uses two ranks of pipes with slightly different tunings so that they produce beats.

Voltage (18)

A measure of the electrical force, or pressure, that causes a current to flow; typically supplied by a generator or a battery and measured in volts.

Voltage amplifier (18)

An amplifier designed mainly for voltage gain.

Voltage gain (18)

The ratio of output voltage to input voltage.

Volume velocity (11)

The rate of air flow in a tube, expressed in units of volume per unit of time (such as m^3/s).

Watt (01)

A unit of power; equal to one joule per second.

Waveform (02)

Graph of some variable (e.g., position of an oscillating mass or sound pressure) versus time.

Waveform (03)

The graph of some variable (e.g., wave displacement, sound pressure) versus time.

Waveguide (32)

A device that transmits waves (e.g., sound, light, or radio waves) over a particular path minimizing their tendency to propagate in all directions.

Wavelength (03)

The distance between corresponding points on two successive waves.

Whistle register (17)

Very high register in a female voice in which the arytenoids form a whistle.

White noise (06)

Noise whose amplitude is constant throughout the audible frequency range.

Windchest (14)

The important part of the organ that distributes air to selected pipes to make them sound.

Woofer (19)

A loudspeaker designed to produce low-frequency sound.

Word (21)

An ordered collection of bvits, typically 2, 4, or 8 bits in length.

Work (01)

The net force on an object times the distance through which the object moves.

Young’s modulus (03)

An elastic modulus of a solid; the ration of force per unit area to the stretch it produces.

Young’s modulus (13)

The ration of stress to strain; also called Young’s modulus.

(A - C) (D - G) (H - L) (M - Q) (R - U) (V - Z)

Copyright 2008, by the Contributing Authors. Cite/attribute Resource . admin. (2005, January 25). Glossary. Retrieved January 07, 2011, from Free Online Course Materials — USU OpenCourseWare Web site: http://ocw.usu.edu/Electrical_and_Computer_Engineering/Science_of_Sound/Glossary_4.htm. This work is licensed under a Creative Commons License Creative Commons License