Barrie By-law 2006-140, s. 1 — Scope This Publication sets out minimum specifications for equipment used for the measurement of sound and vibration. For most of the specifications the International Electrotechnical Commission

Scope This Publication sets out minimum specifications for equipment used for the measurement of sound and vibration. For most of the specifications the International Electrotechnical Commission

• (IEC) recommended standards 123 (First edition 1961), 179 (Second edition 1973) and 179A (First supplement to IEC 179, published 1973) have been adopted. In some cases, these standards are amended or augmented for greater precision.
• 102-1 NPC-102 Type of Instrument Application Section 3 General Purpose Sound Non-impulsive sounds Level Meter 4 Impulse Sound Level Meter Impulsive sounds 5 Peak Pressure Level Detector Peak pressure perturbations 6 Type B Integrating Sound Varying sounds of low crest Level Meter factor 7 Type A Integrating Sound Varying sounds of high crest Level Meter factor 8 Vibration Velocity Detector Peak vibration velocity in solids 9 Acoustic Calibrator Calibration of sound level meters