How to Measure Noise Levels at Home and What Double Glazing Can Do

Traffic outside your bedroom, barking dogs next door or passing trains can make it difficult to relax at home. But how do you work out how much noise is entering your rooms, and whether upgrading your windows could help?

Measuring noise levels at home gives you a useful starting point. By recording when noise occurs, comparing different rooms and checking your windows, you can better understand the problem before choosing a solution.

This guide explains how to check noise levels, interpret your readings and understand what double glazing can do to create a quieter home.

Understanding Noise Measurements

Sound levels are measured in decibels, usually written as dB. Sound meters commonly display dB(A), which adjusts the measurement to reflect the way human hearing responds to different frequencies.

When checking noise at home, you may see these measurements:

• Current level: The sound level at that moment.
• LAeq: The average sound level over the measurement period, accounting for changes in sound energy.
• Maximum level: The highest recorded level during the test, using the meter’s selected settings.

An average reading helps you understand ongoing noise, while the maximum reading can highlight louder events such as a passing truck. A single number will not capture everything that makes noise annoying. Its duration, frequency and timing also matter, particularly when you are trying to sleep.

How to Measure Noise Levels at Home

Choose a Sound Level Meter or Phone App

A dedicated sound level meter is a useful option for home checks. Look for one that offers A-weighted readings and records average and maximum levels.

A smartphone app can also help you identify patterns, although accuracy varies between apps, microphones and devices. The NIOSH Sound Level Meter app for iOS is one researched option. NIOSH reports that its app was accurate within ±2 dBA under laboratory test conditions. This does not mean every phone app offers the same accuracy.

Treat informal phone readings as estimates. For a formal noise assessment or detailed advice about a persistent problem, an acoustic consultant can use calibrated equipment and interpret the results.

Start Where Noise Bothers You Most

Measure in the places where you normally experience the disturbance, such as beside your bed, at your home office desk or in your living room.

Keep the microphone uncovered and follow the device’s positioning instructions. Use the same location and height for repeat measurements, and avoid moving the device during a test.

Switch off unnecessary indoor sound sources, including the television or music. If an appliance or fan needs to remain on, record that in your notes so you can account for it later.

Measure at Different Times

A quiet afternoon reading may not reflect what happens during peak traffic or late at night.

Take readings during the periods that matter to you, including:

• Morning and evening traffic
• Your usual bedtime
• Regular train or aircraft movements
• Times when nearby activity is most noticeable

For an initial check, use a consistent period, such as 10 to 15 minutes, and repeat it across several days. Extend your observations if the noise is intermittent. Record the average, maximum and any events that occurred during each test.

Compare Open and Closed Windows

Take readings with the window open, then repeat the test with it fully closed and latched.

Keep the measurement position and duration consistent. Try to compare periods with similar outside activity, because a change in traffic can affect the result.

If closing the window makes the room noticeably quieter, it suggests the window opening is an important noise pathway. If noise remains intrusive, sound may still be travelling through the glass, frame or seals, or through other parts of the building.

This comparison is a useful screening check. It cannot tell you exactly how much improvement a new glazing system will deliver.

Keep a Simple Noise Diary

Pair your measurements with notes about what you hear and how it affects you.

Record the room, time, window position, measurement duration and likely noise source. You might also note whether the noise interrupted a conversation, disturbed your sleep or made it difficult to concentrate.

A diary helps you describe the problem clearly when discussing window upgrades with a specialist.

Check How Noise Enters Your Home

Windows are often a weak point in a building’s ability to keep outside sound out. However, the performance of the complete window matters, including the glass, frame, seals and installation. Doors, ventilation openings and surrounding construction can also provide pathways for sound.

Inspect your windows for loose seals, visible gaps and sashes that do not close properly. Notice whether the noise seems strongest near a particular window, door or vent.

Addressing these pathways helps you choose an improvement that targets the problem. Adding better glass may have limited benefit if significant noise continues to enter through an unsealed opening elsewhere.

What Double Glazing Can Do for Noise Reduction

Double glazing uses two layers of glass separated by a space. A suitable combination of glass, spacing and effective seals can reduce the amount of outside sound entering a room.

However, double glazing systems do not all perform equally. Glass thickness, laminated glass, the air gap and the type of noise influence the result. Australian Government guidance recommends considering thicker or laminated glass and larger air gaps when addressing lower-frequency traffic and aircraft noise.

This makes the choice of glazing particularly important for homes near busy roads. A window selected mainly for thermal insulation may not provide the acoustic performance you need.

How Add-On Double Glazing Works

Add-on double glazing, also called secondary glazing, adds a separate glazed layer to the inside of an existing window.

Stop Noise’s add-on double glazing system works with existing windows, creating an additional air space between the original glass and the internal glazing. It allows homeowners to explore a window upgrade without replacing the entire existing window.

Secondary glazing can provide good noise control. Its suitability depends on the existing window, available space, glass specification and installation.

For homeowners who want to retain their existing windows, it is an option worth discussing during a property assessment.

Set Realistic Expectations

Glazing can reduce sound entering through windows, but it cannot remove every source of noise.

Results depend on your home’s construction, the noise source and other sound pathways. Low-frequency rumbling and vibration may need a broader assessment.

You should also consider ventilation. Acoustic benefits generally rely on keeping the glazing closed, so fresh air and cooling needs should be part of the discussion when planning an upgrade.

Ask about the expected performance of the proposed complete system and whether relevant acoustic test information is available.

Compare Noise Levels After Installation

After upgrading your windows, repeat your measurements using the same device, location, settings and duration.

Aim for comparable outside conditions. Different traffic volumes or weather can make before-and-after readings misleading.

Alongside the numbers, consider practical changes. Can you hear conversations more clearly? Are passing vehicles less distracting? Does your bedroom feel quieter at night?

These observations help you assess the improvement in the spaces where it matters most.

Take the Next Step Towards a Quieter Home

Measuring noise levels helps you understand when disturbance occurs and which rooms need attention. Checking your windows and keeping a short noise diary can make your discussion with a glazing specialist more useful.

If outside noise is affecting your home, explore Stop Noise’s add-on double glazing solutions. Share your window details and the noise you experience to discuss a suitable option for your property.