Calibration Services

A sound level meter is commonly a hand-held instrument with a microphone and is used for acoustic measurements or noise assessments. The diaphragm of the microphone responds to changes in air pressure caused by sound waves and converts the sound pressure deviation into an electrical signal. The Acoustics Laboratory of the SCL provides calibration services on sound level meters as per the tests for the acoustic and electrical responses with different frequency and time weightings described in the International Standards BS 7580, IEC 60804, IEC 60651 and IEC 61672-3. The calibration covers the frequency range from 63 Hz to 16 kHz.

 

A sound calibrator is designed to produce one or more known sound pressure levels at one or more specified frequencies when coupled to specified models of microphone in specified configurations whose electroacoustic characteristics fulfill the requirements stipulated in the International Standard IEC 60942. The Acoustics Laboratory of the SCL provides calibration services on the sound pressure level, frequency accuracy and total distortion of sound calibrators according to Annex B (periodic tests) of the International Standards IEC 60942. The calibration covers the frequency range from 63 Hz to 16 kHz at the sound pressure level from 94 dB to 124 dB.

 

A noise dose meter / personal sound exposure meter is used to measure the noise exposure of a person integrated over a period of time and is useful for determination of occupational noise exposure in accordance with the international standards. The Acoustics Laboratory of the SCL provides calibration services on the noise dose meters as per the tests described in the International Standard IEC 61252. The calibration covers the frequency range from 63 Hz to 8 kHz.