Employers must provide employees with the information, instruction, training and supervision they need to perform their work safely and without risk to their health.

Of these, the classification method, is the simplest and most widely used. The octave method may be more suitable if there is a dominant noise frequency present.

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Employers should provide employees with instructions on how to correctly fit, use, clean, maintain and store their hearing protectors. The instructions should be in line with the  manufacturer's instructions.

Involving employees in the selection of hearing protectors where they are able to personally trial and choose their own device may help ensure the use of hearing protectors. Managers and supervisors should also encourage the use of hearing protectors by setting an example themselves. They should provide supervision to ensure employees wear hearing protectors at all times where required.

Expandable foam earplugs are rolled into a thin tube and inserted into the ear canal. Using this type of earplug may present hygiene issues in dirty work environments.

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The classification method rates hearing protectors from Class 1 to 5. To use this method, it is necessary to know employees’ eight-hour exposure level (LAeq8h). Once the exposure level is known, select the class of protector as indicated in the table. The following table also shows the corresponding SLC80 values.

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Removing hearing protectors even for short periods can significantly decrease the 'effective' protection. Table 2 illustrates how the protection provided by a hearing protector rated at 30dB is affected when it is not worn for short periods.

Reusable earplugs are usually made of silicone or similar materials and are inserted or pushed into the ear canal. These plugs are washable and can be used in dirty environments as they do not need to be handled or rolled like expandable foam plugs. Custom-moulded earplugs are moulded specifically for the wearer's ear canal. This means they provide a high level of protection.

Earplugs tend to be more comfortable than earmuffs when used for long periods, particularly in hot or humid environments. The level of protection from earplugs is highly dependent on achieving a good fit.

Earmuffs fit most people, are hygienic, easy to fit correctly and suitable for use in dirty areas. Earmuffs are also suitable for employees with medical conditions that do not allow them to insert earplugs into their ears.

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Exposure to noise that exceeds the standard is considered dangerous to employees' hearing. Employers must ensure employees' exposure to noise does not exceed the noise exposure standard.

However, earmuffs may be uncomfortable to wear for prolonged periods due to the weight and clamping force of the headband.

Employers must apply each level of the hierarchy so far as reasonably practicable before moving down to the next control measure. This means employers cannot go straight to hearing protection to control the noise without applying the higher-level control measures, so far as reasonably practicable.

It is important to ensure hearing protection provides adequate protection and is worn at all times in noisy areas. Hearing protectors should not reduce noise exposure much below 75 dBA because of the problems of over-protection.

Ear canal caps are usually on a headband and seal the entrance to the ear canal. They are not inserted into the ear canal. Ear canal caps are usually more convenient when they have to be taken on and off, for example, when passing through noisy areas or being in noisy areas for very short periods of time). However, ear canal caps generally provide less noise protection than other types of hearing protectors.

If there is uncertainty about whether noise exposure exceeds or may exceed the standard, employers must determine an employee's exposure to noise in the workplace. When determining noise exposure, employers must not take into account the effect of any hearing protectors employees may be using.

This means it is better to select a hearing protector that is comfortable and likely to be worn during the entire exposure rather than one that provides high protection but is uncomfortable and likely to be removed for short periods.

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WorkSafe Victoria acknowledges Aboriginal and Torres Strait Islander people as the Traditional Custodians of the land and acknowledges and pays respect to their Elders, past and present.

If hearing protectors are required to control noise exposure below the standard, then audiometric testing (hearing tests) is required.

If a very high level of protection is required, earplugs and earmuffs can be used in combination.  Combining earplugs and earmuffs can increase noise reduction by about 5 dB. It is important to note that the total noise reduction is not the sum of the individual hearing protectors. As a general rule, add 5 dB to the higher value to estimate the total noise reduction.

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The hierarchy of control is a step-by-step approach to eliminating or reducing risks. It ranks risk controls from the highest level of protection and reliability through to the lowest.

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WorkSafe Victoria is committed to safe and inclusive work places, policies and services for people of LGBTIQ communities and their families.

Employers must clearly identify when and where hearing protectors are to be worn. Identification may include signposting areas and rooms or by labelling plant.

Information about employers' duties is available on the WorkSafe website, including the Noise compliance code. The Noise compliance code provides practical guidance on how to comply with obligations under Victoria’s occupational health and safety legislation to manage risks associated with workplace noise exposure.

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The Class, SLC80 value and the noise reduction data at various frequencies for the octave method are usually on or in the packaging or on the hearing protector itself.

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Employers have a duty to protect the health and safety of their employees. This duty includes protecting employees from exposure to noise. The Occupational Health and Safety Regulations 2017 (OHS Regulations) set a noise exposure standard measured in units called decibels (dB). The noise exposure standard is an 8-hour average of 85 dB(A) and a peak noise level of 140 dB(C) at the employee's ear position.

As shown, even if hearing protection is worn 98.6% of the exposure time, it only provides 18 dB overall reduction, not 30 dB. Similarly, if protection is worn for 84% of the time, it only provides an effective reduction of 8 dB instead of 30 dB.

Employers must provide hearing protection when employees' exposure to noise still exceeds the exposure standard after applying the higher level controls in the hierarchy of control.

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