Tympanometer Calibration
IEC 60645-5 Middle Ear Analyzer Calibration
Service Summary
Tympanometer calibration verifies probe tone frequency and level accuracy, equivalent ear canal volume measurement, and middle ear pressure sweep performance against IEC 60645-5 and ANSI S3.39 standards. Accurate tympanometry is foundational to diagnosing otitis media, Eustachian tube dysfunction, ossicular chain disorders, and sensorineural hearing loss.
Why It Matters
Miscalibrated probe tones produce erroneous compliance peaks, leading to false Type B tympanograms or missed perforation findings.
Pressure sweep accuracy directly affects peak pressure measurement — critical for pediatric screening protocols and tube placement decisions.
IEC 60645-5 calibration is required for instruments used in ISO 17025-accredited laboratory settings and JCAHO-accredited hospitals.
Multi-frequency tympanometry (MFT) instruments require calibration across 226 Hz, 678 Hz, and 1000 Hz probe tones independently.
Instruments & Platforms Covered
Immittance Systems
- Interacoustics AT235 / AT235h
- Grason-Stadler TympStar Pro
- Otometrics TITAN / Impedance Station
- Natus HearStation
Combination Units
- Interacoustics Equinox 2.0
- Otometrics AURICAL Aud
- GSI Audera
- MedRx AVANT Tympanometer
Portable Tympanometers
- Welch Allyn MicroTymp 4
- Maico MT 10
- Inventis Timpany
- PATH medical Sentiero
Don't see your model? Contact us — we service virtually all clinical audiology equipment.
Service Workflow
Physical & Probe Inspection
Probe tip, port, and seal integrity checked. Probe tone output measured on a calibrated 0.5 cm³ cavity at 226 Hz, 678 Hz, and 1000 Hz.
Pressure System Verification
Pressure pump linearity and range verified across -400 to +200 daPa using a calibrated pressure reference and digital manometer.
Compliance & ECV Measurement
Acoustic admittance measurement accuracy verified using calibrated cavity volumes. ECV readings compared against known-volume standards.
Calibration Report Issuance
All measurements documented against IEC 60645-5 tolerances. NIST-traceable certificate issued digitally with full measurement tables.
Standards & Regulations
Tympanometer calibration requirements are defined by IEC 60645-5 and referenced by ASHA guidelines for clinical immittance audiometry.
Defines calibration requirements for probe tone level, frequency, pressure range, compliance measurement accuracy, and ECV.
ANSI equivalent standard covering acoustic immittance instruments used in the United States.
ASHA guidelines on audiologic screening reference IEC 60645-5 compliance for tympanometry used in pediatric protocols.
Calibration certificates document probe tone frequencies measured, level accuracy at each frequency, pressure range and linearity, ECV accuracy, and overall pass/fail status against IEC 60645-5 Table 1 tolerances.
Tympanometer Calibration — Request Service
Submit a request online or call for immediate assistance. Certificates issued same day.