SoundAdvisor™ Audiometer Calibration System
The Larson Davis AUDcal is a robust and simple by design Class 1 audiometer calibration system developed to check the accuracy of hearing test equipment. It provides a clear and...
Key Product Features
Model: AudCal-831C
Meets BS EN IEC 60645-1:2017
Clear Pass/Fail
Audio Recording
Instant Reports
Narrowband Noise Level
Sound Booth Noise Levels
Speech Signals
Pulsed Signals
Audiometer Calibration
Production Testing
Hearing Aid Test
R & D
Intuitive Software
G4 LD Software leads you through each step with automatic detection of signals using four different standards including ANSI S3.6 (2010) and IEC 60645 (2017).
Pulse Test
This module is used to calibrate and verify the pulsed signal characteristics of an audiometer to ensure they meet international standards (like ANSI S3.6 or IEC 60645).
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Frequency Test
Each blue bar represents a standard testing frequency (from 125 Hz to 8000 Hz). Tolerance Bars: The light blue boxes represent the allowable error range (usually +/- 1% or 2% depending on the standard). Live Measurement: At the top, you can see a live reading of 213.3 Hz at a level of 31.1 dB HL. This suggests the audiometer is currently outputting a tone near the 250 Hz mark, but it hasn't been recorded as a pass/fail yet.
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Mobile Connectivity
Setup, control, and run your test from a mobile device using the LD Atlas app available for both iOS and Android.
Automatic Corrections
Software corrects for reference equivalent threshold for sound pressure levels (RETSPL) for microphones and couplers as well as other response adjustments.
Octave Filters
With real-time fractional octave filters, FM and pulse capabilities, plus powerful FFT and narrowband analysis and total harmonic distortion, 831C-AUD creates a fully functional audiometer measurement system.
Calibrate with Confidence
In the UK, the accuracy of an audiogram is only as reliable as the calibration of the equipment used. For audiologists, clinical scientists, and occupational health professionals, staying compliant with British Standards (BS) and BSA Recommended Procedures is not optional—it is a clinical necessity.
The Larson Davis AudCal System is a turnkey, portable solution designed to ensure your audiometric equipment meets every stringent UK requirement with "one-tap" efficiency.
Total Compliance
The AudCal system is built on the foundation of the SoundAdvisor™ Model 831C (a Class 1 Sound Level Meter), ensuring your clinic adheres to the following critical standards:
Acoustic Reference Levels (BS EN ISO 389)
Booth Qualification (BS EN ISO 8253-1)
Coupler Accuracy (BS EN IEC 60318)
Audiometer Performance (BS EN IEC 60645)
Built for Professionals
AUDcal is used by occupational health providers, audiologists, hospitals, and acoustic consultants worldwide. The intuitive software guides users step by step, automatically records results, and reduces the risk of error.
The system supports calibration in line with recognised British Standards, including BS EN ISO 389, BS EN 60645, and BS 7189, helping ensure audiometers remain accurate, compliant, and audit ready.
Key Product Specifications
2 Year Warranty
Frequency Capture 1/1 & 1/3 Octaves
Class 1
FFT Mode
Wireless Connectivity
Vibration Analysis
Portable Carry Case
Bluetooth
Product Accessories
Every product needs flexibility to do whatever you want it to.
Download Datasheet
Multi-Frequency Acoustic Calibrator
LD-CAL1250
6ft Extension Cable
CA-LD-EXC006
Audiometer Calibration Firmware
CA-831C-AUD
Custom Carrying Case
CA-LD-CCS055
Wifi Adapter
CA-DVX014
Microphone Adapater
CA-LD-ADP010
NBS 9-A Coupler for 1" Microphone
CA-LD-AEC100
1" Pre-polarized Pressure Microphone
CA-LD-377A15
Preamp Microphone Adapter
CA-LD-ADP008A
Ear Simulator with 1/2" Microphone
CA-LD-AEC201-A
Artificial Mastoid
CA-LD-AMC493C
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Guides & Downloads Email SupportFrequently Asked Question's
What is the SoundAdvisor Audiometer Calibration System used for in the UK?
The SoundAdvisor Audiometer Calibration System (AudCal) is designed for audiometer calibration in the UK, enabling accurate testing and verification of hearing assessment equipment.
It provides a Class 1 calibration solution for both clinical and occupational health environments, ensuring audiometers produce reliable and consistent results for hearing tests.
What standards and regulations does the system support?
The system is designed to meet key international and UK-relevant standards for audiometer calibration and hearing test accuracy, including:
• BS EN IEC 60645 1:2017 for audiometer performance
• IEC 60645 and ANSI S3.6 for audiometric calibration and verification
• Supporting methods aligned with ISO and UKAS-accredited calibration practices
These standards ensure audiometers are calibrated correctly, helping organisations maintain compliance with medical, occupational health, and hearing conservation requirements.
What types of tests can the system perform?
The SoundAdvisor system performs a full suite of audiometer calibration tests, including:
• Frequency and hearing level accuracy
• Linearity and signal distortion checks
• Pulsed and speech signal testing
• Narrowband and broadband noise level measurements
• Audiometric booth ambient noise assessment
This comprehensive capability ensures that audiometers are fully tested against required standards for accurate hearing assessments.
What features does the SoundAdvisor system provide?
The system is built around the SoundAdvisor 831C Class 1 sound level meter, offering advanced measurement and calibration features, including:
• Automatic pass/fail results and instant report generation
• Intuitive AudCal and G4 software for guided calibration workflows
• Real-time octave band, FFT, and narrowband analysis for detailed acoustic testing
• Automatic RETSPL corrections for microphones, couplers, and transducers
• Support for multiple transducers, including headphones, insert earphones, and bone vibrators
These features create a complete, professional audiometer calibration system that is easy to use while delivering high-precision results.
How is audiometer calibration data analysed and reported?
The system integrates with G4 LD Utility and AudCal software, guiding users through each calibration step and automatically detecting signals based on recognised standards.
At the end of testing, users can generate detailed calibration reports and certificates with pass/fail results, which can be exported as PDFs for clinical records, audits, and compliance documentation.
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