The world of acoustics is overflowing with terms and parameters. We explain what the 'terms' mean in the practical world.
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Acoustic Glossary, Sound Vibration Definitions, Terms, Units and Measurement - Home | acoustic-glossary.co.uk Reviews
https://acoustic-glossary.co.uk
The world of acoustics is overflowing with terms and parameters. We explain what the 'terms' mean in the practical world.
acoustic-glossary.co.uk
Acoustic Glossary - M words : Sound and Vibration, Definitions, Terms, Units, Measurement ...
http://www.acoustic-glossary.co.uk/definitions-m.htm
Sound and Vibration : Definitions, Units, Measurements, Terms starting with M. Square metre - area. Cubic metre - volume. Cubic metre per second - volumetric flow. M/s : metre per second. Metre per second squared - acceleration. Metre per second cube - jerk. Under Minimum Audible Field. A region around a magnetic material or a moving electric charge within which the force of magnetism acts. 1:- magnetic flux or Flux Density. For a specified sound in the presence of another (masking) sound. Is the mass of...
Acoustic Glossary - F words : Sound and Vibration, Definitions, Terms, Units, Measurement ...
http://www.acoustic-glossary.co.uk/definitions-f.htm
Sound and Vibration : Definitions, Units, Measurements, Terms starting with F. Noise levels measured at 1 metre from a building and includes the noise reflected from the building. The derived SI unit of electric capacitance; the capacitance of a capacitor between the plates of which a potential of 1 volt is created by a charge of 1 Coulomb. Named after Michael Faraday. See the FFT entry below. FFT : Fast Fourier Transform. Constant Bandwidth, Constant Percentage Bandwidths. To relate a decibel reading, a...
Acoustic Glossary - G words : Sound and Vibration, Definitions, Terms, Units, Measurement ...
http://www.acoustic-glossary.co.uk/definitions-g.htm
Sound and Vibration : Definitions, Units, Measurements, Terms starting with G. Noise with a statistically random time distribution - White Noise. SI prefix = 10. See other SI Units. Also known as a grad. One grad or gradian equals 9/10 of a Degree. Or π/200 of a Radian. Unit of mass in the metric system. Rather than the gram is considered the base unit of Mass. In the SI units because the gram is so small. The old French spelling gramme is sometimes used but gm is wrong. A unit for measuring Acceleration.
Acoustic Glossary - O words : Sound and Vibration, Definitions, Terms, Units, Measurement ...
http://www.acoustic-glossary.co.uk/definitions-o.htm
Sound and Vibration : Definitions, Units, Measurements, Terms starting with O. A range of frequencies whose upper frequency limit is twice that of its lower frequency limit. For example, the 1000 Hertz octave band contains noise energy at all frequencies from 707 to 1414 Hertz. In acoustical measurements, Sound Pressure Level. The sound pressure level of sound that has been passed through an octave band pass filter is termed the octave band sound pressure level. FFT- Fast Fourier Transform. Measures soun...
Acoustic Glossary - E words : Sound and Vibration, Definitions, Terms, Units, Measurement ...
http://www.acoustic-glossary.co.uk/definitions-e.htm
Sound and Vibration : Definitions, Units, Measurements, Terms starting with E. Ear Simulator : Artificial Ear. Early Decay Time : EDT. Is derived from the Reverberation Time. Decay curve - the section between 0 dB and 10 dB below the initial level. A short EDT is a good indicator of speech clarity. As early reflections that reach the listener within 50 ms integrate with the direct sound and can improve speech clarity - see the Haas Effect. In acoustics more commonly known as the RMS - Root Mean Square.
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Sound and Vibration Instrument Hire and Calibration - BSI, NPL and UKAS Traceability
http://www.gracey.co.uk/ga-calibration.htm
Gracey and Associates 01234 708835. Sound and Vibration Instrument Hire and Calibration. BSI, NPL and UKAS Traceability. For over 40 years we have been calibrating sound and vibration instruments, accelerometers and measurement microphones. Our ISO 9001 laboratory is audited by British Standards on a regular basis and all our calibration equipment and certificates are traceable to both NPL. Diams; Quick turn round at reasonable prices. Diams; Call or e-mail for a quotation now.
NTi : STIPA - Speech Intelligibility analyser : Gracey & Associates
http://www.gracey.co.uk/descriptions/nti-stipa-d1.htm
Gracey and Associates 01234 708835. Sound and Vibration Instrument Hire and Calibration. STIPA - Speech Transmission Index Public Address systems. NTi Audio XL2 STIPA - Speech Intelligibility Measurement option. Pound; 27 a day *. Public address systems in shopping centres, railway stations, airports, concert halls etc., have to clearly inform people about escape information and directions in case of an emergency, as well as more general information. NTi Audio : TalkBox. NTi Audio : Minirator MR-PRO.
NTi Reverberation and Sound Insulation
http://www.gracey.co.uk/descriptions/nti-rt+insulation-d1.htm
Gracey and Associates 01234 708835. Sound and Vibration Instrument Hire and Calibration. NTi Audio : XL2 Reverberation Time Analyser. NTi XL2 : Reverberation Time Analyser. Pound; 24 a day *. The NTi XL2 analysers we hire measure the RT60 Reverberation Time. From 63Hz to 8 kHz using the Schroeder. Specifies measuring the 20 dB decrease, multiplying the answer by 3 and labelling the result RT60 (T20). And a non-directional loudspeaker. With a power amplifier. See the other NTi XL2 Features.
Sound and Vibration Basics - Menu
http://www.gracey.co.uk/basics/index.htm
Gracey and Associates 01234 708835. Sound and Vibration Basics. Many of our customers have sound level measurements thrust upon them and for a short period in their lives they are expected to understand the terms and sometimes complex parameters we use every day. So this section is aimed at the non-specialists. Select one if the links below to read some basic information on the topic. DB - the decibel. A, B, C, D, Flat, Lin, Linear and Z. Integrating Sound Level Meters. SPL, Lp, etc.
BS EN 1299 Mechanical vibration and shock. Vibration isolation of machines, BSI 1299
http://www.acoustic-standards.co.uk/bs-01299.htm
Sound and Vibration Standards. BS EN 1299 : Mechanical Vibration and Shock. Vibration Isolation of Machines. Standard Number : BS EN 1299:1997 A1:2008. Title : Mechanical vibration and shock. Vibration isolation of Machines. Information for the application of source isolation. Publication Date : 15 October 1997. International Relationships : EN 1299:1997. Amended By : Amendment April 2009 Amends and Replaces BS EN 1299:1997. Draft Superseded By : 08/30175664 DC 94/701704 DC. Bull; Site Search.
BS ISO 31 Quantities and units. Acoustics BS31, ISO31
http://www.acoustic-standards.co.uk/bs-00031.htm
Sound and Vibration Standards. BS ISO 31 : Acoustics. Standard Number : BS ISO 31-7:1992. Title : Quantities and units. Status : Superseded, Withdrawn. Publication Date : 16 July 2004. Withdrawn Date : 31 July 2007. Replaced By : BS EN ISO 80000-8:2007. Replaces : BS 5775-7:1993, ISO 31-7:1992. International Relationships : ISO 31-7:1992. Bull; Site Search. Acoustic Terms and Definitions. Certified Instrumentation for Hire. This site is maintained by. Bull; Instrument Search.
BS EN 1501 Noise test code for refuse collection vehicles. BS1501, EN1501
http://www.acoustic-standards.co.uk/bs-01501.htm
Sound and Vibration Standards. BS EN 1501 : Refuse Collection Vehicles. Standard Number : BS EN 1501-4:2007. Title : Refuse collection vehicles and their associated lifting devices. General requirements and safety requirements. Noise test code for refuse collection vehicles. Publication Date : 30 November 2007. International Relationships : EN 1501-4:2007. Bull; Site Search. This site is maintained by. The sound and vibration instrument hire and calibration specialists. Bull; Instrument Search.
BS EN 1265 Noise test code for foundry machines and equipment, BSI 1265
http://www.acoustic-standards.co.uk/bs-01265.htm
Sound and Vibration Standards. BS EN 1265 : Safety of Machinery. Noise - Foundry Machines and Equipment. Standard Number : BS EN 1265:1999 A1:2008. Title : Safety of machinery. Noise test code for foundry machines and equipment Status : Current. Publication Date : 15 December 1999. International Relationships : EN 1265:1999. Amended By : Amendment August 2009. Amends and Replaces BS EN 1265:1999. Draft Superseded By : 08/30175655 DC93/717204 DC. Bull; Site Search. Acoustic Terms and Definitions.
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Acoustic Glossary, Sound Vibration Definitions, Terms, Units and Measurement - Home
Sound and Vibration : Definitions, Terms, Units, Measurements. The world of acoustics is overflowing with terms and parameters. For example; Lmax is often used to describe the maximum sound level, but was the measurement A-weighted. And was a Fast, Slow or Impulsive Time Weighting. Used Already we have introduced several variables for one basic measurement, without mentioning the measurement duration. However in the real world many people continue to use the 'simple' Lmax. Similarly the terms L A.
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