G.R.A.S. has developed and manufactures a range of standards compliant artificial ears, couplers, ear simulators and test fixtures noted for their quality, reliability and durability (click on image for details):
 

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Artificial Ears
Type 43AA for telephone handsets, includes an individually calibrated IEC 318 Ear Simulator RA0039	Type 43AB for hearing aids, includes an IEC 126 2cc Coupler RA0038	Type 43AC for insert type earphones, includes an IEC 711 Ear Simulator RA0045
Type 43AD for acoustic transmitters & loudspeakers, includes an IEC 318 Ear Simulator RA0039	Type 43AF for telephone handsets & earphones includes an NBS 9-A Coupler RA0075
Couplers
RA0038 2cc, 1/2" microphone, IEC 60126 Ed. OB (prev. IEC 126) and ANSI S3.7-1973	RA0113 2cc, 1" microphone, IEC 60126 Ed. OB (prev. IEC 126) and ANSI S3.7-1973	NBS 9-A Coupler RA0075 for testing earphones according to ANSI S3.7 - 1995
Ear Simulators
RA0039 IEC 60318 (prev. IEC 318) and ITU-T Recommendations P.57 (08/96)	RA0045 IEC 60711 (prev. IEC 711) and ITU-T Recommendations P.57 (08/96)	Type 43AE for supra-aural earphones, telephone handsets and loudspeakers, IEC 60711
Type 43AG for realistic reproduction of acoustic properties of the ear of an average human head
Mouth Simulators
Type 44AA simulates sound field around the human mouth at close quarters, IEEE 269, 661 and ITU-T Rec. P51	Type 44AB simulates sound field around the human mouth as per 44AA but without internal power amplifier.
Pinna Simulators
RA0057 high-leak Pinna Simulator, outer ear simulator for testing telephones and loudspeakers	RA0056 low-leak Pinna Simulator, outer ear simulator for testing telephones and loudspeakers
Hearing Protection Test Fixture
Type 45CA for testing hearing-protection devices (supra-aural as well as circumaural), conforms with ISO 4869-3

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Other G.R.A.S. Sound and Vibration products

• NEW release :: easy selection microphone sets
• Microphones
• Preamplifiers
• Power Modules
• Intensity microphones and calibrators
• Intensity Probes
• Pistonphones and Calibration equipment
• Telephone test head
• KEMAR Manikins - Types 45BM and 45BA
• Accessories
• Handset Positioning System - Type 45EA