During pure-tone audiometry, clinicians often present tones at very low intensity levels. If background noise is too high, it can mask these tones and lead to inaccurate results.

An audiometric booth (or audiology booth) is a specially constructed, sound-reducing enclosure used to perform accurate hearing assessments. Its main purpose is to reduce background noise, helping patients detect faint sounds during a hearing test.

For this reason, audiometric booths are designed to reduce ambient sound levels, typically below 25 dB sound pressure level (SPL).

Audiometric booths achieve sound reduction through a combination of carefully designed features. Their walls use multi-layer panels with dense materials such as steel or plasterboard. They also add acoustic damping and absorptive layers to block external noise.

Some structures also use vibration isolators to reduce vibrations entering the booth. Inside, acoustic absorption materials help minimise echoes and reverberation, ensuring that sounds are clear and undistorted during testing.

They also provide a controlled environment through features such as double-glazed acoustic windows and magnetic door seals.

Together, these elements help create a controlled acoustic space for precise test results. This ensures external noises like traffic, conversations, ventilation, or building vibrations, have a reduced affect on hearing tests.

In addition to creating low-noise conditions, audiometric booths offer several key advantages that make hearing assessments accurate, reliable, and comfortable.

• Comfort and utility are also a benefit. Many booths are equipped with silent ventilation systems, internal lighting, and jack panels. This allows for easy connection to audiometers or other diagnostic equipment.
• Mobility is also a practical advantage. Many models are fitted with castors or modular designs that allow easy repositioning within clinics, hospitals, or industrial workplaces.
• Types and sizes also vary to suit different needs. These range from compact, single-occupancy screening booths to larger, fully equipped audiometric suites.

Overall, audiology booths help reduce outside noise that could cause inaccurate or false-positive hearing test results. This ensures reliable and reproducible outcomes for patients. It’s important to note that an audiometric booth cannot eliminate background noise entirely.

The term “acoustic space” was first mentioned by Marshall McLuhan, a professor and a philosopher. Acoustic space is an acoustic environment in which sound can be heard by an observer. This could be when outside or when in a confined space. People refer to both of these situations as acoustic environments.

Good acoustics are highly dependent on the purpose of the space and the needs of its users. People may consider something “good” in one setting but find it unsuitable in another. For example, a concert hall, a classroom, a recording studio, and an audiometric test room each require different acoustic qualities.

Within audiology specifically, standards strictly define good acoustics to ensure accurate hearing assessment. The international standard ISO 8253-1 specifies the maximum permissible ambient sound pressure levels in an audiometric test room.

Designers set these limits to prevent background noise from masking test signals, which could otherwise affect hearing threshold measurements. The standard ensures that hearing tests are reliable, valid, and comparable across clinical settings.

Learn about the impact of background noise on industrial screening results.