Acoustic Couplers & Ear Simulators

For Audiometric Calibration and Production Testing | Series AEC & AMC

Whether testing an earphone, hearing aid or audiometer, there is a Larson Davis coupler to satisfy your requirements. Due to the rugged, stainless steel construction and product quality you can rely on your Larson Davis coupler or ear simulator to work dependably for many years.

Applications

  • Audiometer Calibration
  • Production Testing
  • Hearing Aid Test
  • R & D

With a range of couplers and simulators to choose for the particular headphone being tested, you can learn more in the Acoustic Coupler & Ear Simulator Comparison Table. Each product's in-depth specifications are also available.

  • AEC100 acoustic coupler for supra-aural earphone testing

    NBS 9A 6 cc Acoustic Coupler for Supra-Aural Earphone Testing

    Model AEC100

    The AEC100 Coupler is a precision acoustic coupler designed primarily for 1 inch microphones and the calibration/testing of supra-aural earphones used in audiometry. It allows accurate and repeatable measurements within its frequency response (up to 8 kHz). It may also be used for production testing where correlation between the coupler and real ear response is not a requisite.

  • AEC201 ear simulator for supra-aural and circumaural earphone testing

    Ear Simulator for Supra-Aural & Circumaural Earphone Testing

    Model AEC201-A

    AEC201-A is a new ear simulator designed to be used with both supra-aural and circumaural earphone at frequencies up to 16000 Hz. Its design meets the requirements of IEC 60318-1:2009 Edition 2 and ANSI S3.7 section 5.4 which make it compatible with earphones like TDH 39, TDH 49, TDH 50, HDA200 and Koss HV/1A. The AEC201-A is supplied with the 377C13 microphone and a Type 1 adapter plate. The optional AEC201-2 is a Type 2 adapter plate for testing earphones such as Koss HV/1A. Weights, accessories and the AEC201-A are all packaged in a durable weather-tight case.

  • AMC493B artificial mastoid for bone vibrator testing

    Artificial Mastoid for Bone Vibrator Tests

    Model AMC493B

    The AMC493B artificial mastoid is a precision mechanical coupler used to calibrate bone conduction hearing aids and audiometer bone vibrators. The AMC493B is cost effective and simple to use and its patented design converts the vibrator force output to an acoustic signal measured with the system’s sound level meter. It is used with the AEC100 coupler or AEC201-A Ear Simulator to perform bone vibrator tests.

  • AEC202 acoustic coupler for insert type hearing aids and earphone testing

    Couplers for Insert Type Hearing Aids and Earphones

    Models AEC202 & AEC203

    • Model AEC202 is used for ½ inch microphones
    • Model AEC203 is used for 1 inch microphones
    • Both units meet IEC 60126 and IEC 60318-5 requirements
    • AEC202 meets ANSI S3.7 2cc and AEC203 meets ANSI S3.7

  • AEC304 occluded ear simulator

    Occluded Ear Simulator

    Model AEC304

    Model AEC304, often referred to as a Series 711 Coupler, is designed to test earphones inserted in the ear

    • Includes ½ inch 12.5 mV/Pa matched microphone
    • Meets IEC 60318-4 and IEC 60711:1981 requirements

Which Coupler Should I Use?

Headphone RETSPL AEC100 AEC201-A AEC202 AEC203 AEC304
Ear Tone ER-3A/5A ISO 389-2
ANSI S3.6
  


(occluded)
Koss HV/1A [1]ISO 389-5
ANSI S3.6
 
   
Telephonics TDH-39 [2]ISO 389-1
ANSI S3.6


   
Telephonics TDH-49 [2]ISO 389-1
ANSI S3.6
 

   
Telephonics TDH-50 [2]ISO 389-1
ANSI S3.6
 

   
Sennheiser HDA200 [3]ISO 389-5
ISO 389-8
ANSI S3.6
 

   
Sennheiser HDA280 [2]ISO 389-1
ANSI S3.6
Sennheiser
 
 


 
   
Sennheiser HDA300 [2]Sennheiser    
Beyer DT-48 [2]ISO 389-1
ANSI S3.6

 

   
Interacoustics DD45 [2]Interacoustics    
Radio Ear B-71 [4]ISO 389-3
ANSI S3.6


   

[1] Use 9-10 N weight and optional AEC201-2
[2] Use 4-5 N weight
[3] Use 9-10 N weight and type 1 adapter plate
[4] Use 4-5 N weight and optional AMC493B weighting mass

 

Specifications

Coupler AEC100 AEC201-A AEC202 AEC203 AEC304
Description NBS 9A (6 cc) Coupler Ear Simulator 1/2 in 2cc Coupler 1 in 2cc Coupler IEC711 Ear Simulator

Standards Compliance

IEC 60318-3:1998
ANSI S3.7-1995

IEC 60318-1:2009
IEC 60318-2:1998
ANSI S3.7-1995, Sec 5.4

IEC 60318-5:2006
ANSI S3.7-1995

IEC 60318-5:2006
ANSI S3.7-1995

IEC 60318-4:2010

CE Compliant Yes Yes Yes Yes
ANSI S3.6 Test Configuration HA-1, HA-2 HA-2
Weight 5.5 lb (2.5 kg) 3.2 lb (1.4 kg) 2.7 oz (77.5 g) 1.7 oz (49.0 g) 3.3 oz (94.8 g)
Height 2.5 in (65 mm) without mass and retainer 2.0 in (50.9 mm) without mass and retainer 1.62 in (4.12 cm) 1.55 in (3.94 cm) 1.5 in (3.81 cm)
Diameter 3.2 in (82 mm) 3.2 in (82 mm) 0.98 in (2.48 cm) 0.98 in (2.48 cm) 0.94 in (2.37 cm)
Effective Volume 6 cc 2 cc 2 cc
Microphone 1 in 377A15 or LD 2575 (not included) 1/2 in 377B13 (included) 1/2 in 377B13 or 1/2 in 377B11 (not included) 1 in 377A15 or LD 2575 (not included) 1/2 in 377B13 (included)
Included Accessories Vibration isolation pillow Vibration isolation pillow 0.035 in hex key, acoustic tubing #13 thick acoustic tubing #13 thick
Optional Accessories 377A15 microphone
2575 microphone
CAL250 Calibrator
AMC493B
Artificial Mastoid
AEC201-2 Type 2 adapter plate for circumaural earphones AMC493B Artificial Mastoid 377B13 or 377B11 microphone 377A15 microphone
2575 microphone
CAL250 Calibrator
CAL250 Calibrator
Additional Features 377B13 is removable Earmold substitute for BTE hearing aids, cup for insert headphones and ITE hearing aids Can be used with AEC100 to share 1 inch microphone Can be calibrated using CAL250 by removing top cone and mesh
Applications IIC, CIC, ITC, ITE, RIC, BTE BTE ITC, ITE, RIC

HA-1

Without Ear Mold Substitute

HA-2

With Ear Mold Substitute

IIC

Invisible In Canal

CIC

Completely In Canal

ITC

In The Canal

ITE

In The Ear

RIC

Receiver In Canal

BTE

Behind The Ear