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Standardised noise

作者:吕忪    发布时间:2019-03-08 03:03:14    

By Barry Fox British employers with noisy premises are legally obliged to check sound levels with a sound pressure level meter. The meters must be accurately calibrated and checked every two years. The Association of Noise Consultants in Royston, Hertfordshire, has been working on a system that lets employers calibrate meters without sending them all off to a specialist laboratory (GB 2 326 478). Their calibration CD contains 69 test tracks of fixed level and plays on an ordinary CD player. An interface unit connects the CD player to the sound level meter,

 

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