Product Overview & Specifications | ACS Audiometer Calibration System

Overview

The software works in conjunction with a high precision data acquisition module, interface box, microphone, and associated couplers. Your computer connects to the measurement system via a USB cable and performs highly accurate acoustic and electrical tests.

125 audiometer and instrument models have built-in setups (see the list). If yours isn’t listed, it can still be calibrated: the User Defined option lets you set up a custom test configuration. All test parameters are fully adjustable and can be saved and loaded from configuration files as needed.

Detailed test results in both tabular and plot form are stored and can be printed if desired. A calibration certificate containing a condensed listing of all test results, audiometer and transducer serial numbers, microphone, mastoid and coupler details, and calibration standards can be printed and given to the customer (see a sample certificate).

ACS-100 SA3 in its carrying case with couplers, an acoustic calibrator and cables — The ACS-100 SA3 travels in a fitted carrying case with its couplers, calibrator and cables.

The software

The hardware takes the measurements. The software makes it fast.

The ACS isn’t just a microphone, coupler and data acquisition box. Most of what sets it apart from other calibration systems is in the software. Click any screenshot to see it full size.

Automatic control of 73 audiometer models

This is what other calibration systems don’t do. Automatic control is available for audiometers that support it: the ACS talks to the audiometer through its RS232 serial or USB port, sets the frequency, level and channel for each test point, takes the measurement, and can adjust the audiometer to the calibration standard. In fully automatic mode the technician is only prompted to change transducers.

Audiometers without that interface are calibrated in manual mode, with the ACS prompting for each setting and measuring the result. The instrument list shows which models support automatic control.

See the automatic-control models

Hands-off testing you can still follow

Once a calibration is running, nobody has to watch the screen. The technician can calibrate other equipment or get the documentation ready while the ACS works. Passing and failing readings each have their own tone, so you can tell what the system is doing from across the room. On screen, out-of-spec values show in red next to the target and the measured difference.

A certificate ready for the customer

When the calibration is done, print a certificate with your company logo. It lists every test result, the audiometer and transducer serial numbers, the microphone, mastoid and coupler details, and the standards used. Anything out of spec is printed in red.

Every calibration on record

Results are stored as tables and plots for every audiometer and transducer. You can view the values from before any adjustments were made, page back through earlier calibrations to spot a drifting headphone, and copy the data into Excel or Word. The ACS also keeps track of your customers, audiometers, headphones and companies.

See all screenshots

The hardware

One compact interface box. Everything plugs in.

The audiometer, headphones, bone oscillator, microphone and mastoid all connect to the ACS interface, which connects to your computer by USB.

Front panel of the ACS-100 SA3 with color-coded headphone, audiometer, bone and continuity jacks — **Front panel.** Color-coded jacks for the headphones (left and right), the audiometer outputs, bone oscillator in and out, and a continuity check.

Rear panel of the ACS-100 SA3 with USB, IEPE power, microphone and mastoid connectors — **Rear panel.** USB to the computer, the microphone input with Lemo/IEPE and 200 V/0 V switches, IEPE power, and the mastoid connector.

Audiometer headphones and cables connected to the front of the ACS-100 SA3 — **Ready to test.** The headphones and the audiometer both connect to the ACS, which switches in a resistive load for electrical tests automatically.

System configurations

Compare ACS models

Choose the system that fits your lab — single, dual and multi-microphone configurations.

Model	Microphones	Mastoid	Best for	Quote
ACS 100 SA3	1 (Type 1)	1	Clinical audiometer and tympanometry calibration — laboratory-grade accuracy for hearing clinics and medical centers.	Get a quote
ACS 200 SA3	2	1	Dual-microphone measurements, enhanced headphone verification and flexible instrumentation support.	Get a quote
ACS 600 SA3	6	1	High-throughput laboratory, production and service environments that need multiple simultaneous measurement points.	Get a quote
ACS 102 SA3	Type 2	—	Screening audiometer calibration with standard headphone measurement — a practical choice for screening programs.	Get a quote

Test modes

Manual, user controlled or fully automatic.

Manual

You are prompted to set frequency, level and channel for each test point. The system provides audible feedback and waits for you to adjust the audiometer until it is within a user definable threshold before proceeding to the next test point.

User controlled

For audiometers under serial or USB control: the system controls and adjusts the audiometer for each test point. You decide which test section to perform.

Fully automatic

For audiometers under serial control: the system controls and adjusts the audiometer for a full battery of tests. You are only prompted to change transducers.

Specifications

Accuracy

Frequency accuracy: < ±1.0 Hz
Frequency uncertainty: 0.11 Hz95% confidence level, k=2
Amplitude accuracy: < ±0.2 dB
Amplitude uncertainty: 0.05 dB95% confidence level, k=2
Distortion: < 0.20 % @ 125 Hz
Linearity test limits: +120 HL to –10 HL

Test coverage

Tests

Audiometer acoustic tests	Output level, distortion, narrowband noise, white noise, speech noise, speech level
Audiometer electrical tests	Frequency, distortion, off level, rise time, fall time, overshoot, crosstalk, linearity, warble, pulse, SISI
Tympanometer tests	Probe output level, compliance, probe pressure, reflex output level, distortion, narrowband, linearity, switching (rise/fall/overshoot/off)
Auditory Brainstem Response (ABR)	Both probe and ABR headset: output level, distortion, intermodulation, linearity
Otoacoustic Emissions (OAE)	Probe output level, distortion, intermodulation, linearity
Other tests	Handswitch test, room acoustic levels (1/3 octave)

Compatibility

Transducers, couplers & mastoids

Transducers supported	Headphones: TDH-39/39P, TDH-49/49P, TDH-50/50P, DD45, Holmco 8103, Holmco 9501, Sennheiser HDA-280, Beyer DT-48, TDH39 in Peltor earcups, DD65, BERAphone Inserts: EAR 2, EAR-3A, EAR-5A, IP30 CIRR Masking Phone, Danavox Single Insert, Eartone 2, IP30, EAR ABR, IP30 ABR, Ear Cup Sanibel, Ear Cup Sanibel IP30 High frequency phones: Sennheiser HDA-200, HDA-280, HDA-300, Koss HV/1A, Radioear DD450, Sennheiser HD 280 Pro Bone oscillators: Radio Ear B-71, B-81, Oticon A20, BKH10
Couplers supported	Headphones: NBS-9A/IEC-303, IEC-318 Inserts: IEC-126/HA-2/DB-0138, IEC-711, HA-1 High frequency phones: IEC 60318-2 Type 1 and IEC 60318-2 Type 2
Artificial mastoids supported	ACS-M1, B&K-4930, Larson Davis AMC493 (AMC493 support includes temperature and humidity compensation). Flexible support for custom mastoids.
Free field options	Degrees of incidence (0/45/90)

Compliance

Standards

Built-in standards	ANSI S3.6 (1969, 1989, 1996, 2004, 2010), IEC-60645, ISO 389 (2002, 2012, 2017), ANSI S3.39, ANSI S3.31, OSHA

Precise calibration, quickly and easily.