noise and vibration in refrigeration and air conditioning systems, safe working practices and relevant standards, codes and regulations, including: fundamentals of sound: frequency decibels octave bands direct sound velocity sound pressure level sound power level sound meters noise and people: physical measurement of sound weighting networks NR curves noise damage to hearing evaluate daily noise exposures peak noise levels attenuation for hearing protectors excess noise levels permissible noise abatement Acts advanced noise and vibration control sound in confined and unconfined spaces: inverse square laws direct and reflective sound reverberation time Sabine's formula absorption coefficients of surfaces types of absorbers and their operation insulation performances of partitions identification and analysis of problems: one-dimensional sound waves standing waves energy in a sound wave sources effects of air turbulence transmitters amplifiers absorptivity reflectivity room characteristics acoustic design in buildings fan and air noise transmission in ducts methods of control: natural attenuation sound absorbing materials and placement duct lining lined plenums lined duct splitters duct attenuators white noise vibration isolators acoustic specifications: attenuator ratings sound insulation: plant room breakout controlling plant room noise duct borne noise: sound power spectra for fans noise attenuation in ducts and fittings reducing fan noise transmission regeneration noise sources of regenerated noise use tables to estimate regenerative noises breakout situations fan noise breakout list methods of controlling breakout controlling the cost: economical use of attenuation vibration: simple harmonic motion (SHM) period frequency amplitude estimate frequencies for fans, pumps and refrigeration plant estimate transmission of vibration vibration control for building structures use transmissibility graphs to select springs, vibration eliminators and pads types of isolation materials and mounting devices select isolation and mounting devices inertia blocks noise and vibration analysis computer software packages relevant job safety assessments or risk mitigation processes relevant technique, process or measurement methods to obtain sound, noise and vibration data, including problem-solving procedures and appropriate theorems relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures. |