Noise & Acoustics

‘….employers are responsible for assessing noise levels and implementing controls as necessary.’

Occupational hearing loss has been recognised as a significant issue throughout many Australian workplaces, and legislative requirements are in place nationally for employers to identify, monitor and control worker exposure.

Worker exposure must not exceed an average sound level of 85dBA over the course of a normal 8 hour shift, or be exposed to a peak sound (pressure) above 140dBC.

We provide initial site assessments to identify excessive noise, personal monitoring (dosimetry) for at risk workers, and can assist with recommendations for suitable controls or hearing protection.

Workplace Noise Audits

A Workplace Noise Audit is usually the most effective method of assessing noise levels throughout the workplace, and is often a legal requirement.

A Noise Audit may involve a desktop study and site assessment, and should include all significant items of plant or other noise sources.

Site data is typically collected from ‘spot measurements’ or ‘static monitoring’. Spot measurements allow for an efficient broad screening throughout a large area, and are useful to identify potentially excessively noisy locations and individual items of plant or equipment. Static monitoring involves equipment at a set location, recording continuous data over the course of a normal shift.

BENSS can conduct all workplace noise assessments, including maritime environments, report in accordance with regulatory requirements, and provide recommendations for a range of controls.


Personal Monitoring (Dosimetry)


If workers are identified to be at risk of excessive noise exposure, personal monitoring over the course of a normal shift provides suitable data to evaluate an individuals average exposure, and identify periods of excessive noise (for example when operating items of machinery).

Based on the result of dosimetry, BENSS can advise on a range of engineering, administrative and protective equipment control methods.

Noise Mapping

Noise mapping of the workplace provides an effective method of presenting noise level data visually, which can then be quickly communicated to all stakeholders.

BENSS Noise Audit reports include the Noise Map, showing changes in noise level as a colour gradient. Map colours can be used to indicate hearing protection requirements, noisy equipment locations or maximum time for an individual to stay in a noisy area.