Audiology Booth Services
ANSI S3.1 Ambient Noise Measurement & Suite Qualification
Service Summary
Audiometric booth qualification verifies that the acoustic environment inside a sound-treated room or prefabricated booth meets the maximum permissible ambient noise levels defined by ANSI S3.1 for the hearing thresholds being tested. Medology performs in-situ measurement using calibrated sound level meters and reference microphones, issuing qualification reports that document compliance with ANSI S3.1 Table 1.
Why It Matters
A booth that fails ANSI S3.1 criteria introduces masking noise that artificially elevates measured thresholds — producing false hearing loss findings.
JCAHO, ASHA, and state licensing bodies require booth qualification records for audiology facilities seeking or maintaining accreditation.
Booth performance degrades over time due to door seal wear, HVAC changes, and structural modifications — periodic re-qualification is required.
Sound field testing and speech audiometry have stricter ambient noise requirements than pure-tone air conduction — combined booth qualification addresses all test modalities.
Instruments & Platforms Covered
Prefabricated Booths
- IAC Acoustics booths
- Eckel Industries booths
- Acoustic Systems booths
- WhisperRoom enclosures
Built-In Sound Suites
- Custom-built sound-treated rooms
- Converted examination rooms
- Two-room audiometric suites
- Newborn hearing screening rooms
Measurement Equipment
- ANSI S3.1 octave-band analysis
- Sound level meter calibration
- Vibration assessment
- HVAC noise characterization
Don't see your model? Contact us — we service virtually all clinical audiology equipment.
Service Workflow
Pre-Visit Site Assessment
Facility provides booth specifications, construction date, and any recent structural changes. Technician reviews HVAC and mechanical noise sources.
Calibrated Microphone Placement
Calibrated reference microphone placed at the test position (ANSI S3.1 specified location) in the occupied booth configuration.
Octave-Band Noise Measurement
Ambient noise levels measured in each ANSI S3.1 octave band (125 Hz – 8 kHz) under worst-case conditions: HVAC on, doors closed, clinical activity simulated.
Qualification Report Issuance
Measured levels compared against ANSI S3.1 Table 1 limits for the applicable test conditions (ears covered / uncovered). Report issued same day.
Standards & Regulations
Audiometric booth qualification is governed by ANSI S3.1 and referenced by ISO 8253-1 for the international community. Qualification reports document compliance at the time of measurement.
Defines octave-band ambient noise limits for audiometric test environments. Table 1 applies to ears-covered (insert/supra-aural) testing; Table 2 to ears-uncovered (sound field).
International standard referencing ambient noise requirements for audiometric test rooms, consistent with ANSI S3.1 framework.
ASHA guidelines for school-based audiometry reference ANSI S3.1 ambient noise requirements for portable and fixed test environments.
Booth qualification reports include measured octave-band levels, ANSI S3.1 Table 1 limit values, pass/fail determination per frequency band, measurement conditions, and the calibration certificate for the reference sound level meter used.
Booth Services — Request Service
Submit a request online or call for immediate assistance. Certificates issued same day.