Audio/Acoustics - Revision history

Zelenka at 19:40, 12 June 2010

2010-06-12T19:40:00Z

Zelenka: /* Cent */

2010-04-09T10:50:40Z

Cent

← Older revision		Revision as of 10:50, 9 April 2010
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	:Cents = 1200. log2 (f2 / f1) = 3.986. log10 (f2 / f1)		:Cents = 1200. log2 (f2 / f1) = 3.986. log10 (f2 / f1)
	:Cents = 1200. log10 (f2 / f1) / log10 (2)		:Cents = 1200. log10 (f2 / f1) / log10 (2)
		+
		+	=====chord=====
		+	A chord (Ger. Akkord) consists of three or more simultaneously erklingenden notes. In general use, the individual components three or four half away (small, large third; triad, Tetrachord, Sept chord).
		+	* Note: The harmony without taking into account the intervals is called cluster [Moorer, 1975].
		+
		+	=====chord progress exceeded=====
		+	Fort chord exceeded (Ger. Akkordfortschreitung) is a sequence of chords, a Fort homorhythmische misuse of sounds, from complex tones are compounded (musically: notes). [PAR]
		+
		+	=====chord fundamental=====
		+	A chord fundamental (Ger. Akkordgrundton) is a physically non-existent, virtually added tone in bass frequency range, see Virtual pitch. [TER]
		+
		+	=====chord class=====
		+	Under a chord chords class (Ger. Akkordklasse) is those whose grades only by the Chroma (pitch-class).
		+	* Note: examples of a chord class: CEG, c2-e2-g2 or g1-e2-c3. The chords can be inverted or doubled (see Stimmakkord? .. Chord mood?).
		+
		+	=====chord close position=====
		+	Final chord position (Ger. Akkord-Schlußposition), the mood is a chord class with the lowest and the highest grade less than an octave away. [PAR]

	=====chroma=====		=====chroma=====

Zelenka: /* A */

2010-04-09T10:43:55Z

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	=====Adaptive psychophysical method=====		=====Adaptive psychophysical method=====
	A psychophysical adaptive method (ger. adaptive psychophysikalische Methode) is primarily for the determination of thresholds set up for this procedure is the charm size depending on the response of the subject to the previously stated charm. The size can be a stimulus) under the direct control of the subject, or b) it is the investigator adjusted depending on the number of previously delivered right or wrong answers.		A psychophysical adaptive method (ger. adaptive psychophysikalische Methode) is primarily for the determination of thresholds set up for this procedure is the charm size depending on the response of the subject to the previously stated charm. The size can be a stimulus) under the direct control of the subject, or b) it is the investigator adjusted depending on the number of previously delivered right or wrong answers.
-
-	~~=====chord=====~~
-	A chord (Engl. chord) consists of three or more simultaneously erklingenden notes. In general use, the individual components three or four half away (small, large third; triad, Tetrachord, Sept chord).
-	* Note: The harmony without taking into account the intervals is called cluster [Moorer, 1975].
-
-	~~=====chord progress exceeded=====~~
-	~~Fort chord exceeded (Engl. chord progression) is a sequence of chords, a Fort homorhythmische misuse of sounds, from complex tones are compounded (musically: notes). [PAR]~~
-
-	~~=====chord fundamental=====~~
-	~~A chord fundamental (English bass fondamentale) is a physically non-existent, hinzugedachter tone in Baßlage, see Virtual pitch. [TER]~~
-
-	~~=====chord class=====~~
-	~~Under a chord chords class (English class chord) is those whose grades only by the Chroma (pitch-class).~~
-	* Note: examples of a chord class: CEG, c2-e2-g2 or g1-e2-c3. The chords can be inverted or doubled (see Stimmakkord? .. Chord mood?).
-
-	~~=====chord final position=====~~
-	~~Final chord position (Engl. chord close-position), the mood is a chord class with the lowest and the highest grade less than an octave away. [PAR]~~

	=====Acceleration=====		=====Acceleration=====

Zelenka: /* B */

2010-04-09T10:42:59Z

← Older revision		Revision as of 10:42, 9 April 2010
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	The band pressure level (ger. Band-Schallpegel) of a sound for a specific wave band is the sound pressure level of a sound within a limited wave band.		The band pressure level (ger. Band-Schallpegel) of a sound for a specific wave band is the sound pressure level of a sound within a limited wave band.
	* Remark: The wave band may be specified by its lower and upper [[#cut-off-frequency\|cut-off-frequency]] or by its pass-band and the bandwidth. The bandwidth of the band may be specified as follows: octave-band (sound) pressure, half-octave-band pressure, third-octave-band pressure, 50-Hz-band pressure.		* Remark: The wave band may be specified by its lower and upper [[#cut-off-frequency\|cut-off-frequency]] or by its pass-band and the bandwidth. The bandwidth of the band may be specified as follows: octave-band (sound) pressure, half-octave-band pressure, third-octave-band pressure, 50-Hz-band pressure.
-
-	~~=====Acceleration=====~~
-	~~(Engl. acceleration; acceleration): acceleration is a vector of the change of speed.~~

	=====Bark=====		=====Bark=====
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	=====bass=====		=====bass=====
	(English bass; bass): Lowest note a chord (see chord root); low frequency or pitch register. [PAR]		(English bass; bass): Lowest note a chord (see chord root); low frequency or pitch register. [PAR]
		+
		+	=====Bulk Acousic Wave (BAW)=====
		+	An acoustic wave that travels through a piezoelectric material, as in a quartz delay line. Also known as volume acoustic wave.
		+	:see also [[#Surface Acousic Wave (SAW)\|Surface Acousic Wave (SAW)]]

	=====Binaural=====		=====Binaural=====

Zelenka: /* Acoustics */

2010-04-09T10:42:41Z

Acoustics

← Older revision		Revision as of 10:42, 9 April 2010
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	=====chord final position=====		=====chord final position=====
	Final chord position (Engl. chord close-position), the mood is a chord class with the lowest and the highest grade less than an octave away. [PAR]		Final chord position (Engl. chord close-position), the mood is a chord class with the lowest and the highest grade less than an octave away. [PAR]
		+
		+	=====Acceleration=====
		+	(Ger. Beschleunigung): acceleration is a vector of the change of speed.

	=====Acoustics=====		=====Acoustics=====

Zelenka at 17:10, 11 May 2008

2008-05-11T17:10:33Z

← Older revision		Revision as of 17:10, 11 May 2008
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		+	<big><big><big> Definitions from the acoustics and sound technology </big></big></big>
		+
		+	Jump to: <big>[[#A\|A]] [[#B\|B]] [[#C\|C]] [[#D\|D]] [[#E\|E]] [[#F\|F]] [[#G\|G]] [[#H\|H]] [[#I\|I]] [[#J\|J]] [[#K\|K]] [[#L\|L]] [[#M\|M]] [[#N\|N]] [[#O\|O]] [[#P\|P]] [[#Q\|Q]] [[#R\|R]] [[#S\|S]] [[#T\|T]] [[#U\|U]] [[#V\|V]] [[#W\|W]] [[#X\|X]] [[#Y\|Y]] [[#Z\|Z]]</big>
		+
		+
		+
	;Note: This article is not completed. Most of this page is automatically translated from german. Alphabetical sort order is not correct.		;Note: This article is not completed. Most of this page is automatically translated from german. Alphabetical sort order is not correct.

-	Jump to: [[#A\|A]] [[#B\|B]] [[#C\|C]] [[#D\|D]] [[#E\|E]] [[#F\|F]] [[#G\|G]] [[#H\|H]] [[#I\|I]] [[#J\|J]] [[#K\|K]] [[#L\|L]] [[#M\|M]] [[#N\|N]] [[#O\|O]] [[#P\|P]] [[#Q\|Q]] [[#R\|R]] [[#S\|S]] [[#T\|T]] [[#U\|U]] [[#V\|V]] [[#W\|W]] [[#X\|X]] [[#Y\|Y]] [[#Z\|Z]]	+
	=A=		=A=
	=====decay time=====		=====decay time=====

Zelenka: /* References */

2008-05-11T17:06:53Z

References

← Older revision		Revision as of 17:06, 11 May 2008
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	= References =		= References =
	*[ANSI] American National Standard Psychoacoustical Terminology (1973): ANSI S3.20-1973; Approved December 5, 1973; American National Standard Institute, Inc.		*[ANSI] American National Standard Psychoacoustical Terminology (1973): ANSI S3.20-1973; Approved December 5, 1973; American National Standard Institute, Inc.
		+	*[DIN] Deutsches Institut für Normung: Akustik
		+	*[NTG] Nachrichtentechnische Zeitschrift
		+	*[PAR] Richard Parncutt (1989): Harmony: A Psychoacoustical Approach; Springer-Verlag Berlin
	*[YOST] Yost, William A. & Donald W. Nielsen (1977): Fundamentals of Hearing. An Introduction. Holt, Rinehart and Winston; New York.		*[YOST] Yost, William A. & Donald W. Nielsen (1977): Fundamentals of Hearing. An Introduction. Holt, Rinehart and Winston; New York.

Zelenka: /* Z */

2008-05-11T17:05:59Z

← Older revision		Revision as of 17:05, 11 May 2008
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	=Z=		=Z=
		+	=====Central masking=====
		+	(German central masking; masking Central): Central masking arises when the masked Schall (Maskee) which offered an ear and the sound maskierende (Masker) the other. The place where central masking is situated on higher levels of the auditory pathway.
		+	* Note 1: The threshold shifts due to central masking rarely exceed 15 dB.
		+	* Note 2: Central masking is distinguished from Kontralateraler masking.

	= References =		= References =
	*[ANSI] American National Standard Psychoacoustical Terminology (1973): ANSI S3.20-1973; Approved December 5, 1973; American National Standard Institute, Inc.		*[ANSI] American National Standard Psychoacoustical Terminology (1973): ANSI S3.20-1973; Approved December 5, 1973; American National Standard Institute, Inc.
	*[YOST] Yost, William A. & Donald W. Nielsen (1977): Fundamentals of Hearing. An Introduction. Holt, Rinehart and Winston; New York.		*[YOST] Yost, William A. & Donald W. Nielsen (1977): Fundamentals of Hearing. An Introduction. Holt, Rinehart and Winston; New York.

Zelenka: /* W */

2008-05-11T17:04:59Z

← Older revision		Revision as of 17:04, 11 May 2008
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	=W=		=W=
		+	=====Migrant waves in the cochlea=====
		+	(Engl. travelling waves; migrant waves): The migrant high frequency waves breaking very soon after the stirrups; low frequencies running along the basilar and form a maximum vibration near the Apex [BEK]
		+
		+	=====White Noise=====
		+	(Engl. white noise, white noise): White noise is a noise which Spektraldichte (spectrum density or spectrum level) substantially independent of the frequency, over a specified area.
		+	* Note: White Noise does not random noise.
		+
		+	=====wave=====
		+	(Engl. wave; wave): A wave is the Disturbanz in a medium such progress that at any point of the medium size, as a measure of Disturbanz serves a function of time, while at any time the deflection at one point a function of the position of the point. Any physical size, the same relationship to an independent variable (usually time), as a progressive Disturbanz, at a certain time, in relation to the place can be called a wave.
		+	:Sound waves are Longitudinalwellen
		+
		+	=====Wavelength=====
		+	(Engl. wavelength; wavelength): The wavelength of a periodic wave in an isotropic medium is the perpendikulare distance between two wave fronts where the relocation (deflections) a phase difference of a full term.

	=Z=		=Z=

Zelenka: /* V */

2008-05-11T17:03:41Z

← Older revision		Revision as of 17:03, 11 May 2008
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	=V=		=V=
		+	=====Variance=====
		+	(Engl. variance; variance): See scattering, standard deviation.
		+
		+	=====concealment=====
		+	(Engl. masking; concealment): syn masking.
		+
		+	=====vibration=====
		+	(Engl. vibration; vibration): vibration is an oscillation whose size is a parameter, the movement of a mechanical system.
		+
		+	=====volume speed=====
		+	(Engl. volume velocity; volume speed): The volume speed is the rate of work-flow of the medium by a specified surface due to a sound wave.
		+	* Note: In mathematical terms, the volume-speed V: u = component of the particle normal speed element to the surface ie the integration is on the surface S by the medium oscillates.
		+
		+	=====Vorverdeckung=====
		+	(Engl. backward masking; Vorverdeckung): syn backward masking.
		+
		+	=====Next masking=====
		+	(Engl. forward masking; Forward masking): Forward masking refers to the situation where the hearing maskierende Schall (Masker) before masked (Maskee) occurs.
		+	* Note: Forward masking is identical to Nachverdeckung (after [Zwicker]), with the sound test (Maskee) after the disturbance Schall (Masker) occurs.

	=W=		=W=