Barrie By-law 2006-140, s. 5(2) — Noise By-law

Sound

• (a) Instrumentation
• (i) Measuring Device

A Peak Pressure Level Detector shall be used.

• (ii) Calibrator An Acoustic Calibrator shall be used.
• (iii) Windscreen

A windscreen shall be used in all outdoor measurements.

• (b) Measurement Location The measurement location shall be at a point of reception out-of-doors within 7 m of a building.
• (c) Use of Instrumentation
• (i) Battery Check If the measuring device is battery powered, the condition of the battery shall be checked after the device has been allowed to warm up and stabilize and after each measurement has been made. The device shall not be used unless the battery condition is con- firmed to be within the range recommended by the manufacturer for proper operation.
• (ii) Calibration The measuring device shall be calibrated after it has been allowed to warm up and stabilize and after each measurement has been made.
• (iii) Meter Setting The measuring device shall be set to read the peak pressure level using linear response and a ‘hold’ facility, if available.
• (d) Instrument Configuration
• (i) Reflective Surfaces The microphone shall be located not less than 1 m above the ground, not less than 1 m from any sound reflective surface and not less than arm’s length from the body of the person operating the device. Not more than one person, other than the operator of the meter, shall be within 7 m of the microphone and that person shall be behind the operator of the meter.
• (ii) Microphone Orientation The microphone shall be oriented such that the concussion wave to be measured is incident at an angle recommended by the microphone manufacturer for flattest frequency response in a free field. By-law 2006-140 34 Office Consolidation The Corporation of the City of Barrie Noise By-law
• (e) Readings
• (i) Peak Pressure Level The value of peak pressure level reported shall be given to the nearest decibel.
• (ii) Variation in Calibration

A measurement shall not be reported if the meter calibration after the measurement is more than 0.5 dB different from that before the measurement.

• (iii) Battery Deterioration

A measurement shall not be reported if the battery condition after the measurement is not within the range recommended by the manufacturer for proper operation.

• (f) Weather Conditions
• (i) Wind Measurements shall not be reported unless the wind- induced sound pressure level is more than 10 dB below the measured peak pressure level. Reference should be made to Publication NPC-102 - Instrumentation.
• (ii) Humidity Measurements shall not be taken if the relative humidity is above the maximum for which the meter specification is guaranteed by the manufacturer (normally 90%).
• (iii) Precipitation Measurements shall not be taken during precipitation.
• (iv) Temperature Measurements shall not be taken when the air temperature is outside the range for which the meter specification is guaranteed by the manufacturer. (Normally only the lower temperature limit is significant.)