Barrie By-law 2006-140, s. 9(2) — Noise By-law

Specifications

A device, capable of producing sound, which meets the following specifications, is an Acoustic Calibrator:

• (a) the device shall be capable of being physically attached to a sound level meter in such a way that the device and the sound level meter are “acoustically coupled”, that is, sound from the device is transmitted through the air by way of a chanter formed by the attachment of the device to the microphone of the sound level meter;
• (b) the device shall produce sound of a stated frequency, within a frequency tolerance of ±5%;
• (c) the manufacturer of the device shall provide with the device, any data required in order to determine the sound level reading which should be indicated on the sound level meter when calibrated for those microphone and sound level meter types with which the manufacturer recommends the device be used. Where additional accessories must be used to provide this sound level reading, the manufacturer shall state that they must be used;
• (d) the maximum tolerance in the sound pressure level generated by the device when coupled to the microphone shall apply over an atmospheric pressure range of 87 kPa to 107 kPa, and shall be ±0.5 dB over the temperature 0 0 0 range of from 0 C to 40 C and ±1.0 dB over the temperature range of from -l0 C to 50 C;
• (e) if the device is battery powered, means for checking the battery condition shall be included with the device;
• (f) the following data shall be provided with the device by the manufacturer,
• (i) the nominal sound pressure level produced,
• (ii) the nominal frequency at which the device operates,
• (iii) the ranges of temperature and atmospheric pressure over which the device is intended to operate, and the applicable overall sound pressure level tolerance for these ranges. By-law 2006-140 24 Office Consolidation The Corporation of the City of Barrie Noise By-law 102-2 Permissible Tolerances on Microphone Sensitivity Over an Angle of ± 30 Frequency Hz Permissible Tolerances dB

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