Sound frequency - Revision history

Designing Buildings at 07:37, 17 February 2025

2025-02-17T07:37:32Z

← Older revision		Revision as of 07:37, 17 February 2025
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	Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.		Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

	* Acoustic consultant.		* Acoustic consultant.
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	* Building regulations.		* Building regulations.
	* Flanking sound.		* Flanking sound.
		+	* Frequency band.
	* Impact sound.		* Impact sound.
	* Noise nuisance.		* Noise nuisance.

Designing Buildings: Reverted edits by 173.245.245.2 (talk) to last revision by Designing Buildings

2022-01-31T07:02:43Z

Reverted edits by 173.245.245.2 (talk) to last revision by Designing Buildings

← Older revision		Revision as of 07:02, 31 January 2022
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−	(or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations that transmit through a medium such as air and reach the ear or some other form of detecting device.	+	Sound (or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations that transmit through a medium such as air and reach the ear or some other form of detecting device.

	It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz)		It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz)

173.245.245.2 at 03:19, 31 January 2022

2022-01-31T03:19:05Z

← Older revision		Revision as of 03:19, 31 January 2022
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−	~~Sound~~ (or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations that transmit through a medium such as air and reach the ear or some other form of detecting device.	+	(or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations that transmit through a medium such as air and reach the ear or some other form of detecting device.

	It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz)		It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz)

Designing Buildings at 13:48, 6 October 2020

2020-10-06T13:48:04Z

← Older revision		Revision as of 13:48, 6 October 2020
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	* Structure-borne sound.		* Structure-borne sound.

−	[[Category:~~Standards_/_measurements~~]] [[Category:~~DCN_Standard~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Standards_/_measurements]]

Editor at 16:18, 20 May 2020

2020-05-20T16:18:47Z

← Older revision		Revision as of 16:18, 20 May 2020
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	* Reverberation.		* Reverberation.
	* Robust details certification scheme.		* Robust details certification scheme.
		+	* Room acoustics.
	* Sound absorption.		* Sound absorption.
	* Sound insulation.		* Sound insulation.
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	* Structure-borne sound.		* Structure-borne sound.

−	[[Category:Standards_/_measurements]]	+	[[Category:Standards_/_measurements]] [[Category:DCN_Standard]]

174.52.169.183 at 04:15, 27 December 2019

2019-12-27T04:15:31Z

Designing Buildings at 14:27, 21 January 2019

2019-01-21T14:27:42Z

← Older revision		Revision as of 14:27, 21 January 2019
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	Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.		Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Acoustic consultant.		* Acoustic consultant.
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	* Sound absorption.		* Sound absorption.
	* Sound insulation.		* Sound insulation.
		+	* Sound power level.
	* Sound reduction index (SRI).		* Sound reduction index (SRI).
	* Sound v noise.		* Sound v noise.

Editor at 16:53, 12 April 2018

2018-04-12T16:53:45Z

← Older revision		Revision as of 16:53, 12 April 2018
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	* Sound absorption.		* Sound absorption.
	* Sound insulation.		* Sound insulation.
		+	* Sound reduction index (SRI).
	* Sound v noise.		* Sound v noise.
	* Structure-borne sound.		* Structure-borne sound.

	[[Category:Standards_/_measurements]]		[[Category:Standards_/_measurements]]

Designing Buildings at 15:54, 11 January 2018

2018-01-11T15:54:55Z

← Older revision		Revision as of 15:54, 11 January 2018
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	As well as intensity and frequency, sound also transmits information. For example, music or speech, transmit information which people may perceive differently from other sounds.		As well as intensity and frequency, sound also transmits information. For example, music or speech, transmit information which people may perceive differently from other sounds.

−	~~[http://www.planningportal.gov.uk/buildingregulations/approveddocuments/parte/approved~~ Approved document E, Resistance to the passage of sound] defines ‘frequency’ as:	+	Approved document E, Resistance to the passage of sound defines ‘frequency’ as:

	The number of pressure variations (or cycles) per second that gives a sound its distinctive tone. The unit of frequency is the Hertz (Hz (formerly called ‘cycles per second’).		The number of pressure variations (or cycles) per second that gives a sound its distinctive tone. The unit of frequency is the Hertz (Hz (formerly called ‘cycles per second’).
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	The sound absorbing characteristics of materials varies significantly with frequency. Low frequency sounds, below 500 Hz, tend to be more difficult to absorb whereas high frequencies sounds, above 500 Hz, are easier to absorb. A material's sound absorbing properties can be expressed by the sound absorption coefficient, alpha, as a function of frequency, where alpha ranges from 0 (total reflection) to 1.00 (total absorption).		The sound absorbing characteristics of materials varies significantly with frequency. Low frequency sounds, below 500 Hz, tend to be more difficult to absorb whereas high frequencies sounds, above 500 Hz, are easier to absorb. A material's sound absorbing properties can be expressed by the sound absorption coefficient, alpha, as a function of frequency, where alpha ranges from 0 (total reflection) to 1.00 (total absorption).

−	Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in ~~[http://shop.bsigroup.com/ProductDetail/?pid=000000000030239779~~ BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation].	+	Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.

	= Find out more =		= Find out more =

Editor at 14:11, 27 March 2017

2017-03-27T14:11:28Z

← Older revision		Revision as of 14:11, 27 March 2017
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−	Sound is caused by vibrations which transmit through a medium such as air and reach the ear or some other form of detecting device.	+	Sound (or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations which transmit through a medium such as air and reach the ear or some other form of detecting device.

−	Sound intensity is measured in Decibels (dB). This is a logarithmic scale in which an increase of 10 dB gives an apparent doubling of loudness. ~~Sound pitch is measured in Hertz (~~Hz), the ~~standard unit for the measurement for frequency~~. The ~~audible~~ range ~~of sound for humans~~ is ~~typically~~ from 20 Hz to 20,000 Hz, although~~, through ageing~~ and exposure to loud ~~sounds the upper limit will generally decrease~~. As well as intensity and frequency, sound also transmits information. For example, music or speech, transmit information which people may perceive differently from other sounds.	+	It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz).
		+
		+	Sound intensity is measured in Decibels (dB). This is a logarithmic scale in which an increase of 10 dB gives an apparent doubling of loudness.
		+
		+	A frequency of 1 Hz refers to one wave cycle per second, while 20 Hz refers to 20 per second, where the cycles are 20 times shorter and closer together.
		+
		+	The audio spectrum is the frequency range which is audible to humans. This generally spans from 20 to 20,000 Hz, although environmental factors influence the precise range for each individual.
		+
		+	Frequencies at the high end of the spectrum are the first to be negatively affected by age and/or hearing damage as a result of prolonged exposure to loud volumes or noise.
		+
		+	As well as intensity and frequency, sound also transmits information. For example, music or speech, transmit information which people may perceive differently from other sounds.

	[http://www.planningportal.gov.uk/buildingregulations/approveddocuments/parte/approved Approved document E, Resistance to the passage of sound] defines ‘frequency’ as:		[http://www.planningportal.gov.uk/buildingregulations/approveddocuments/parte/approved Approved document E, Resistance to the passage of sound] defines ‘frequency’ as:

← Older revision		Revision as of 04:15, 27 December 2019
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−	Sound (or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations ~~which~~ transmit through a medium such as air and reach the ear or some other form of detecting device.	+	Sound (or audio) frequency is the speed of the sound’s vibration which determines the pitch of the sound. Sound is caused by vibrations that transmit through a medium such as air and reach the ear or some other form of detecting device.

−	It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz).	+	It is measured as the number of wave cycles that occur in one second, with the standard unit of measurement being Hertz (Hz)

	Sound intensity is measured in Decibels (dB). This is a logarithmic scale in which an increase of 10 dB gives an apparent doubling of loudness.		Sound intensity is measured in Decibels (dB). This is a logarithmic scale in which an increase of 10 dB gives an apparent doubling of loudness.
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	A frequency of 1 Hz refers to one wave cycle per second, while 20 Hz refers to 20 per second, where the cycles are 20 times shorter and closer together.		A frequency of 1 Hz refers to one wave cycle per second, while 20 Hz refers to 20 per second, where the cycles are 20 times shorter and closer together.

−	The audio spectrum is the frequency range ~~which~~ is audible to humans. This generally spans from 20 to 20,000 Hz, although environmental factors influence the precise range for each individual.	+	The audio spectrum is the frequency range that is audible to humans. This generally spans from 20 to 20,000 Hz, although environmental factors influence the precise range for each individual.

	Frequencies at the high end of the spectrum are the first to be negatively affected by age and/or hearing damage as a result of prolonged exposure to loud volumes or noise.		Frequencies at the high end of the spectrum are the first to be negatively affected by age and/or hearing damage as a result of prolonged exposure to loud volumes or noise.

−	As well as intensity and frequency, sound also transmits information. For example, music or speech, transmit information which people may perceive differently from other sounds.	+	As well as intensity and frequency, sound also transmits information. For example, music or speech, transmit the information which people may perceive differently from other sounds.

	Approved document E, Resistance to the passage of sound defines ‘frequency’ as:		Approved document E, Resistance to the passage of sound defines ‘frequency’ as:
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	A ‘frequency band’ is a continuous range of frequencies between stated upper and lower limits. An ‘octave band’ is a frequency band in which the upper limit of the band is twice the frequency of the lower limit. A ‘one-third octave band’ is a frequency band in which the upper limit of the band is 2 times the frequency of the lower limit.		A ‘frequency band’ is a continuous range of frequencies between stated upper and lower limits. An ‘octave band’ is a frequency band in which the upper limit of the band is twice the frequency of the lower limit. A ‘one-third octave band’ is a frequency band in which the upper limit of the band is 2 times the frequency of the lower limit.

−	The sound absorbing characteristics of materials ~~varies~~ significantly with frequency. Low frequency sounds, below 500 Hz, tend to be more difficult to absorb whereas high frequencies sounds, above 500 Hz, are easier to absorb. A material's sound absorbing properties can be expressed by the sound absorption coefficient, alpha, as a function of frequency, where alpha ranges from 0 (total reflection) to 1.00 (total absorption).	+	The sound-absorbing characteristics of materials vary significantly with frequency. Low-frequency sounds, below 500 Hz, tend to be more difficult to absorb whereas high frequencies sounds, above 500 Hz, are easier to absorb. A material's sound absorbing properties can be expressed by the sound absorption coefficient, alpha, as a function of frequency, where alpha ranges from 0 (total reflection) to 1.00 (total absorption).

	Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.		Similarly, the sound insulation of materials varies with frequency. Low-frequency sounds tend to be attenuated less by passing through sound insulating materials than high-frequency sounds. As a result, the sound attenuation properties of materials are generally measured at a range of frequencies representative of normal human hearing and this is then compared to a reference frequency profile such as that defined in BS EN ISO 717-1 Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation.