The Quiet Injury: What Employers Need to Know About Workplace Hearing Loss  

Hearing loss is one of those workplace injuries that rarely announces itself. There is no sudden incident or moment of harm that might normally be associated with an “injury”. Slowly but surely, hearing loss erodes one of our most vital senses. By the time an employee notices something is wrong, the damage is often already done. Since the injury typically develops gradually, hearing loss can often be overlooked until the impact is significant. And unlike a muscle strain or a broken bone, hearing loss doesn’t heal. Once hearing ability diminishes, it cannot be recovered. 

 As one of the most common occupational illnesses faced by Australian workers, hearing loss is far less obvious, but unfortunately far more permanent. More than 1.1 million Australians are exposed to hazardous levels of noise at work, and the consequences extend far beyond the individual employee. For employers, hearing loss translates into workers’ compensation claims, regulatory compliance risks and a workforce that is less safe, less productive and less connected.  

 And while it’s irreversible, this widespread health issue is definitely preventable. That’s why it’s important to talk about workplace hearing loss: what it is, what your obligations are and what a proactive hearing health and conservation program looks like in practice. 

What is Workplace Hearing Loss? 

 Noise-induced hearing loss (NIHL) occurs when the delicate hair cells inside the cochlea (the inner ear) are damaged by exposure to loud or sustained noise. These cells are responsible for translating sound vibrations into signals that the brain can interpret. These sensitive structures do not regenerate after damage. This damage also accumulates over time, meaning even moderate noise levels can become hazardous with enough exposure. 

 The lack of pain or warning signs associated with NIHL often makes it undetectable until the loss of hearing is already significantly advanced. Workers may first notice difficulty understanding speech in noisy environments or a persistent ringing in the ears known as tinnitus. Over time, broader hearing difficulties are apparent that can affect communication, safety and quality of life both inside and outside of work. 

 Common sources of hazardous workplace noise include: 

• Heavy machinery and industrial equipment – plant floors, manufacturing lines, processing facilities 

• Power tools – grinders, drills, saws, nail guns 

• Vehicles and transport – forklifts, trucks, earthmoving equipment, planes 

• Alarms, ventilation and warning systems – particularly in mining, construction and emergency services 

• Amplified sound – in music, entertainment and hospitality settings 

Industries with the highest exposure rates include mining, manufacturing, construction, aviation, agriculture and transport. But hazardous noise exists across many sectors, including hospitality, retail and healthcare. 

Employer Responsibilities Under WHS Legislation 

Across Australia, Work Health and Safety (WHS) laws require employers (or PCBUs) to manage hazardous noise as thoroughly as they would any other workplace risk. Guidance from Safe Work Australia makes it clear that employers must take a systematic approach to prevention. 

The PCBU has an obligation to: 

1. Identify hazardous noise 

Hazardous noise is defined in the WHS Regulations as noise that exceeds an average of 85 dB(A) over an eight-hour working day (the exposure standard), or a peak noise level of 140 dB(C). The first step is knowing where and when these thresholds are being exceeded in your workplace. 

2. Assess noise exposure 

Once hazardous noise sources are identified, a formal noise assessment should be conducted to quantify exposure levels and identify which workers are at risk. 

3. Implement control measures 

Australia’s WHS framework requires employers to apply the hierarchy of controls, which means engineering controls and administrative controls must be considered before relying on personal protective equipment (PPE). In order of priority: 

• Elimination or substitution – remove the noise source or replace it with quieter equipment 

• Engineering controls – enclose machinery, install acoustic barriers, maintain equipment to reduce vibration and noise 

• Administrative controls – rotate workers to limit individual exposure time, schedule noisy tasks during low-occupancy periods 
• PPE – hearing protection devices such as earmuffs or earplugs as a last line of defence 

4. Monitor and review 

It’s worth emphasising that PPE alone is not sufficient as a primary control measure and it cannot replace the need for noise monitoring and health surveillance. Without ongoing assessment and evaluation (as reinforced by state regulators), there is no way to know whether controls are actually working or whether hearing is being protected. 

Health Surveillance: When Early Detection of Damage is Key 

Health surveillance encompasses the process of monitoring the many facets of workers’ health to enable early detection of work-related illness or harm. In the case of noise-induced harm, audiometric testing is used to measure an individual’s ability to hear sounds across a range of frequencies. 

When implemented correctly, health surveillance helps organisations: 

• Detect early changes in hearing or shifts in hearing ability, before permanent damage occurs 

• Track trends across the workforce to identify high-risk roles or work areas 

• Evaluate the effectiveness of your noise controls over time 

• Meet record-keeping obligations required under WHS legislation 

• Demonstrate due diligence in the event of a workers’ compensation claim or regulatory audit 

Testing results are confidential to the individual, but aggregate and anonymised data should be used to inform your broader noise management strategy, 

Why Baseline Testing Matters (and Exit Testing Does Too) 

An all-important baseline is set when an initial hearing test is conducted before, or very shortly after, a worker commences duties in a noisy environment. This baseline audiometry test becomes a significant reference point, which in turn: 

• Establishes an individual audiometry profile at the start of employment or before (potentially hazardous) noise exposure begins 

• Enables meaningful comparison over time, making it easier to detect deterioration at the earliest possible stage 

• Helps distinguish work-related changes from pre-existing conditions or age-related hearing loss 

• Supports fair and defensible workers’ compensation decisions, protecting both business and employees 

Equally as important, although less commonly implemented, is exit employment testing. This follow-up closes the loop for a clear record of the worker’s hearing at different stages of employment. The baseline and exit testing together create a complete picture of an individual’s hearing health while also acting as a strong indicator of the effectiveness of the workplace controls in place. 

Acting On Results 

Detecting a change in a worker’s ability to hear does not mark the end of the process, but rather, the beginning of an action plan. So, when audiometric testing reveals a shift in hearing thresholds, employers should act promptly and systematically by: 

• Reviewing noise controls: have engineering or administrative measures been properly implemented and maintained? Are they still adequate for current noise levels? 

• Re-assessing PPE effectiveness: is hearing protection being used correctly and consistently? Is the right type of protection being used for the noise levels present? 

• Providing education and retraining: ensure workers understand the risks, know how to correctly fit and use hearing protection and feel empowered to raise concerns. 

• Considering job task modifications: for workers showing significant change, adjusting duties to reduce or eliminate noise exposure may be necessary while further assessment takes place. 

• Referring for further assessment: workers with identified hearing changes should be referred to an audiologist for comprehensive evaluation. 

The Bottom Line 

Hearing loss should not be an accepted cost of doing business in a noisy industry, especially when it’s preventable. And if your workforce is exposed to hazardous noise, listen up and review your hearing health program. 

Bodycare can support your organisation in looking honestly at whether current noise controls are adequate, whether your audiometric testing program includes proper baselines and whether your team is equipped with the knowledge to protect themselves. We provide workplace audiometric testing and health surveillance programs that are built around your industry, your workforce and your compliance obligations. Our experienced team conducts on-site hearing assessments, delivering clear, actionable reporting, and enables your proactive approach to hearing health. Don’t wait for the noise to fade out; get in touch today.