[CDATA[ That means you can compare the reading you have just taken with a similar reading you may have taken 6 months ago safe in the knowledge that any variation in performance has already been taken into account. In non-typical use, such as: – in areas with high or low moisture, – in extreme temperatures, or – where equipment is used irregularly. The sound level meter is then said to be calibrated (for a particular measurement). – Any requirements of the test specification – Does the application specifically define a maximum calibration period. However, the microphone is a delicate device designed to fulfil all specifications requested. The actual calibration is then carried out by mounting the calibrator onto the microphone as shown in the picture and then switch the calibrator on. (e in b)&&0=b[e].o&&a.height>=b[e].m)&&(b[e]={rw:a.width,rh:a.height,ow:a.naturalWidth,oh:a.naturalHeight})}return b}var C="";u("pagespeed.CriticalImages.getBeaconData",function(){return C});u("pagespeed.CriticalImages.Run",function(b,c,a,d,e,f){var r=new y(b,c,a,e,f);x=r;d&&w(function(){window.setTimeout(function(){A(r)},0)})});})();pagespeed.CriticalImages.Run('/mod_pagespeed_beacon','https://www.norsonic.asia/to-calibrate-or-not-and-how-often/','82dtZm2p5Q',true,false,'IkF-BMoVhHw'); At www.castlecalibration.com you can find out pricing and build your own calibration quote online. 5 Biggest Noise at Work Mistakes highlighted in this eBook. Sound level meter calibration by the manufacturer is something I recommended annually. Some Regulations (like the 2005 Control of Noise at Work Regulations) state that a sound level meter should be returned every two years and the Acoustic Calibrator every year. Some Regulations (like the 2005 Control of Noise at Work Regulations) state that a sound level meter should be returned every two years and the Acoustic Calibrator every year. It involves using an Acoustic Calibrator that is usually supplied as part of your measurement kit. Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Pinterest (Opens in new window), Click to email this to a friend (Opens in new window), Cirrus Research: Breaking the Sound Barrier in Motorsport, Research reveals drop in noise pollution during Covid-19 lockdown, Noise Nuisance Training – Learn how to get the best from your Cirrus Trojan Noise Nuisance Equipment, Visit Cirrus Research for our range of sound level meters and noise measurement instrumentation, UK Government Introduces New Covid Noise Limit For Bars, Pubs & Restaurants, Cirrus Research partner with Yorkshire racing driver Max Coates, When the information collected is to be used for legal purposes (for example to show compliance with occupational noise standards such as the Noise at Work Regulations or OSHA’s 1910.95), Where the measurement data is to be used to select hearing protection or noise control products, Where the information is to be used for environmental compliance or for a planning application. However, the more often you have the sound level meter calibrated, the less risk of your measurements being questioned. After purchasing your sound level meter kit, field calibration won’t cost you anything as the Acoustic Calibrator should be already supplied. If the instrument has had to offset any variation, it should display this as well. If you’re measuring to any Standard, Regulations or Guidelines it is vital to calibrate your sound level meter. – Reference to the maximum period recommended in the table at the back of the LAB23 document depending on the type of equipment used. Regulations (like the 2005 Control of Noise at Work Regulations) state that a sound level meter should be returned every two years and the Acoustic Calibrator every year. To calibrate a sound level meter we use what is called a sound calibrator — such as the Norsonic sound calibrator Nor1251, Nor1252 or Nor1253 and the new series Nor1255, Nor1256, Nor1257 and Nor1258. Do you calibrate a sound level meter frequently? I always recommend erring on the side of caution, especially when you are measuring to Standards, Regulations and Guidelines. For sound measurements, calibration is no less than paramount since sometimes legal action will be taken based on the sound and noise levels measured! Now that you have calibrated your sound level meter, you are ready to … If not, the accuracy of your measurements could be called into question. If there’s no evidence that the equipment has been calibrated before the measurements were made and that all of the equipment had been calibrated to a suitable standard, the measurements could be called into question. Only if the microphone capsule passes all of these tests is it deemed acceptable to be used with the sound level meter. Question: C. How Often Should The Sound Level Meter Be Calibrated (field Calibration By "acoustic Calibrator" Or Pistonphone)? Modern sound level meters are sophisticated instruments and so require a level of understanding from a calibration lab that is often not found in labs that are not noise specialists. Each time your instrument is used it should be calibrated using an Acoustic Calibrator before and after each measurement to check that it is working as correctly.

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