every year, every second year etc.) Sound level meter calibration by the manufacturer is something I recommended annually. – Expected use of the equipment – heavy use or harsh environments should shorten the calibration period. As with any precision instrument, components age and can be subjected to changing environments. Not calibrating often enough is just one of the 5 Biggest Noise at Work Mistakes highlighted in this eBook. – Instrument specifications and manufacturer’s instructions – What does the manufacturer recommend. A field calibration is a simple check of the instrument that checks it against a known level (usually 94dB or 114dB) at a known frequency (usually 1kHz) using an acoustic calibrator. D. Should Your Precision Microphone (such As Your Sound Level Meter -not Your Microphone For Voice Recording) Be At 0-deg Incident Or 90-deg Incident With The Noise Source? Obviously, the sound level meter is not the only part of this which is “infected” by uncertainties. Instrument Classes If you have any questions about the calibration of your equipment, please contact us and we will be pleased to help. Post was not sent - check your email addresses! Now that you have calibrated your sound level meter, you are ready to … [CDATA[ If you are going to continue to use your noise measurement instruments over a long period, it is vital that they continue to meet these same standards and this is why calibration, both Field Calibration and Periodic Verification, are an essential part of undertaking noise measurements. Building acoustics multi channel analyzer ISO16283 ASTM E336. After purchasing your sound level meter kit, field calibration won’t cost you anything as the Acoustic Calibrator should be already supplied. However, the more often you have the sound level meter calibrated, the less risk of your measurements being questioned. Visit Cirrus Research for our range of sound level meters and noise measurement instrumentation, Cirrus Research: Breaking the Sound Barrier in Motorsport, Research reveals drop in noise pollution during Covid-19 lockdown, UK Government Introduces New Covid Noise Limit For Bars, Pubs & Restaurants, Cirrus Research partner with Yorkshire racing driver Max Coates, Peace of mind that your sound level meter is measuring consistently over a given time period, Proof from the manufacturer that sound level meter and Acoustic Calibrator are functioning normally, Improved performance and a longer lifespan if you look after it, it will last longer, If your sound level meter comes under warranty, it may become invalid if regular calibration is not carried out. This is not sufficient to meet the demands of standards such as the Control of Noise at Work Regulations and would not be acceptable evidence of calibration if your measurements were ever challenged or subject to scrutiny. If there’s any variation between what the calibrator is outputting and the what the microphone is receiving, the sound level meter can offset the difference to ensure your measurements are consistent and accurate against a consistent noise source. For field calibration, you should be using your Acoustic Calibrator before and after each measurement. – Review of calibration history – The calibration period should be reviewed and changed if necessary; a history of stable results may increase the period. The first, field calibration, is what you would carry out before (as possibly after) each measurement using a reference acoustic source such as an acoustic calibrator. If there’s any variation between what the calibrator is outputting and the what the microphone is receiving, the sound level meter can offset the difference to ensure your measurements are consistent and accurate against a consistent noise source. If you want more information on pricing, contact Cirrus today as they can calibrate any instrument from any manufacturer. Keep calibrating! However, the more often you have the sound level meter calibrated, the less risk of your measurements being questioned. As with any precision instrument, components age and can be subjected to changing environments. This may sound like a long process and it is but it’s the only way to confirm that the entire instrument is working as it was when it was new. I hope this answers your questions on how often you should calibrate a sound level meter. A lower number indicate better quality and accuracy. On a regular basis (e.g. However, the more often you have the sound level meter calibrated, the less risk of your measurements being questioned. However, the microphone is a delicate device designed to fulfil all specifications requested. Do you calibrate a sound level meter frequently? (e in b.c))if(0>=c.offsetWidth&&0>=c.offsetHeight)a=!1;else{d=c.getBoundingClientRect();var f=document.body;a=d.top+("pageYOffset"in window?window.pageYOffset:(document.documentElement||f.parentNode||f).scrollTop);d=d.left+("pageXOffset"in window?window.pageXOffset:(document.documentElement||f.parentNode||f).scrollLeft);f=a.toString()+","+d;b.b.hasOwnProperty(f)?a=!1:(b.b[f]=!0,a=a<=b.g.height&&d<=b.g.width)}a&&(b.a.push(e),b.c[e]=!0)}y.prototype.checkImageForCriticality=function(b){b.getBoundingClientRect&&z(this,b)};u("pagespeed.CriticalImages.checkImageForCriticality",function(b){x.checkImageForCriticality(b)});u("pagespeed.CriticalImages.checkCriticalImages",function(){A(x)});function A(b){b.b={};for(var c=["IMG","INPUT"],a=[],d=0;d