sound intensity measurement Articles

  • A Guide to Noise Measurement Terminology

    There are 100s of different acoustic parameters that can be used during your noise measurements. Each parameter can tell you something different the noise you’re monitoring. How do you remember what all this noise measurement terminology means and what it does? We’ve already covered ...


    By Cirrus Research plc

  • When Sound Becomes Noise

    Music to the ears of some can equally be perceived as unwanted, irritating noise to others – as illustrated by a recent news article about a Sydney pub forced to cancel live music on Sunday afternoons after five trouble-free years ...


    By Innova Global Limited.

  • A New DIRAC Measuring Speech Intelligibility

    Speech intelligibility measurements in situations where there is a large distance between the receiver and the sound source, require the source and receiver to operate independently. While this leads more often than not to practical conflicts,DIRAC 4.0 provides a unique solution.HistorySpeech intelligibility relates to the sound intensity modulations in the talker’s voice, as ...

  • What are decibels, the decibel Scale and noise measurement units?

    What is the decibel scale The human ear is an extremely versatile and amazing hearing device. It has a clever in-built mechanism that reduces its own sensitivity as the sound level rises and it also has the remarkable ability to handle an enormous range of sound power levels. It can hear the sound of a pin dropping close-by as well as the roar of a jet engine far away.  ...


    By Pulsar Instruments Plc

  • Recording audio with level triggers - Sound Level Meters

    Recording audio from a sound level meter measurement is sometimes necessary. Perhaps you need to listen to identify the source of a noise or for post-processing – or even to play back to a project stakeholder. If a measurement is short, it’s easy enough to record audio for an entire measurement and afterward crop the relevant parts. However, measuring for days, weeks or months, ...

  • Impact of sound attenuation by suspended sediment on ADCP backscatter calibrations

    Abstract. Although designed for velocity measurements, acoustic Doppler current profilers (ADCPs) are widely being used to monitor suspended particulate matter in rivers and in marine environments. To quantify mass concentrations of suspended matter, ADCP backscatter is generally calibrated with in situ measurements. ADCP backscatter calibrations are often highly site-specific and season ...


    By Teledyne RD Instruments

  • A new DIRAC measuring speech intelligibility

    History   Speech intelligibility relates to the sound intensity modulations in the talker’s voice, as described by Houtgast et al. [1]. This principle is used to determine speech intelligibility from the remaining modulation at a receiver position, using a modulated noise source at the talker position. The noise spectrum represents that of a human voice, and modulations at ...

  • Noise measurement in the fast lane! - case study

    Due to the nature of the Vehicle and Operator Services Agency (VOSA) work, noise is an inevitable by-product of its daily activities. Consequently to ensure the welfare of both its staff and the community in which it operates, VOSA undertakes regular noise assessments to ensure that the relevant regulations are being adhered to, thereby protecting both the environment in which it operates as well ...


    By Cirrus Research plc

  • NASA acts to reduce crawler transporter noise

    The United Space Alliance sought outsideassistance to evaluate and develop noise controlmeasures for NASA’s two CTs at KSC aspart of a modernisation and upgrading program.NASA selected Noise Solutions Inc. (ageneral acoustical contractor) and their subcontractorFaszer Farquharson & Associates ofCalgary, Canada to engage in this project. Thefirst phase of the sound study ...

  • Keeping quiet about DCNS

    DCNS, one of Europe’s leading naval defence groups and contractor for integrated warships and systems, is a dedicated user of Brüel & Kjær sound and vibration solutions. This article, written with the support of DCNS, illustrate show PULSE™ is playing a central role at key DCNS operation centres in Northern France; helping with design, maintenance, acceptance testing ...

  • Reducing noise levels through engineering controls

      It"s fairly easy to control personal exposure to noise by limiting exposure time or using hearing protectors like ear plugs or ear muffs.  Engineering controls are usually applied to the machinery that produces noise. Imagine a 200 foot x 175 foot manufacturing facility with a 30 foot high ceiling.  In this building are a variety of cut-off saws, grinders, millers and other ...

  • Casella intrinsically safe TUFF personal air sampling pump and dBadge sound level meter are a hit down under with Australian department of defence

    Following a competitive tender process, the Australian Department of Defence has taken delivery of 180 TUFF personal air sampling pumps and 180 CEL-350 dBadge personal noise dosimeters from Casella CEL (www.casellameasurement.com; 01234 844100), leading global specialist in industrial hygiene and occupational health monitoring equipment. Ronald Azar, ...


    By Casella

  • Noise in the Animal Shelter Environment: Building Design and the Effects of Daily Noise Exposure

    Sound levels in animal shelters regularly exceed 100 dB. Noise is a physical stressor on animals that can lead to behavioral, physiological and anatomical responses. There are currently no policies regulating noise levels in dog kennels. The objective of this study was to evaluate the noise levels dogs are exposed to in an animal shelter on a continuous basis and to determine the need, if any. ...


    By Troy Acoustics Corporation

  • Case Study - Siemens Industrial Turbomachinery AB

    Problem Two large gas turbines (approximately 25m x 12m x 10m) were installed in an industrial area nearby an office building. The gas turbines generate a tonal noise component at around 2700Hz caused by the inlet channel blades pass frequency. This tone imposes a more stringent noise requirement on the supplier, forcing noise reducing actions being made on the turbine. ...


    By Norsonic AS

  • Case study - Nor848A Acoustic Camera Metro station in Taipei, Taiwan

    After the construction of the elevated sky train, too high noise levels were appearing under the line and local communities were complaining. Therefore acoustic absorbing panels were mounted under the metro line at critical sites in order to reduce noise emission. To document the effect of the absorbers a Norsonic Nor848A 1.0 meter acoustic camera was setup for recording and reporting on the ...


    By Norsonic AS

  • INTA – exterior noise certification of Airbus A330 MRTT

    INTA is a Public Research Body specialising in aeronautic and space research and technological development. It owns a multitude of Brüel & Kjær products including a 30-channel PULSE system and a 6-channel LAN-XI system which are used daily. One of the latest and most important jobs performed by INTA is the Noise Certification of Airbus Military’s A330 MRTT which it achieved ...

  • Case study - Finding acoustical weak points in room dividing modular walls

    Problem A conference hotel is using modular walls to divide large halls into several smaller conference rooms. The rooms are divided by modular walls that provide several different opportunities for subdivision and multipurpose use of the large area spaces. When measuring the sound insulation between adjacent rooms through the modular walls, the resulting value was found to be too ...


    By Norsonic AS

  • Environmental Noise

    Introduction The ability to hear sounds is a sensory function vital for human survival and communication. However, not all sounds are wanted. 'Unwanted sounds', for which the term 'noise' is normally used, often have their origin in human activities (mainly transport, industry and households). This article addresses environmental noise ­ also referred to in the scientific literature as ...

  • Canarina CUSTIC software · noise dosimeters and modeling · introduction 5

    Noises are irregular and disordered vibrations including all possible frequencies. The intensity of a sound I can be expressed in decibels with the standard equation: L=10 log(I/I0) where I0 is the quietest sound most people can hear, the threshold of hearing 10-12Wm-2.  When the ratio is between ...

  • 10 Benefits of Using the Right Tool to Collect and Manage Data

    - The evolution from data hunter and gatherer to performance manager through measurement and tools -With reporting season in full flight, many sustainability managers are still forced back into being hunter and gatherers. Loud signals can be heard through all internal communication channels within an organisation that they are gearing up to track down that last piece of data. Their tools often ...


    By thinkstep

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you