Ear simulator/coupler
Ear simulator/coupler
  • Ear simulator/coupler

CRY319 Ear simulator/coupler

2 cc coupled cavity, resonant frequency = 22.4 kHz

CRY319 is a kind of coupled cavity with the volume of 2 cc in accordance with IEC 60318-5. It can be adapted to 1/2'' pressure-field measurement microphones according to IEC 61094-4 (WS2P), such as CRY372, CRY332, CRY334 and other measurement microphones. Hearing aids and headphones for air conduction are connected to the coupled cavity by ear inserts (e.g. ear molds or similar devices). The coupler has a resonant frequency of 22.4 kHz to avoid interference with measurements within the audible frequency range. This coupled cavity kit has a built-in CRY372 measurement microphone with the sensitivity of 12.5 mV/Pa and the noise floor of 20 dB(A).

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  • High stability
  • High precision
  • Interference immunity
Features
Standard-compliant

Standard-compliant

  • Compliance with IEC 60318-5:2006 Part 5: 2 cm³ coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts

  • Compliance with ANSI S3.7:2008 American National Standard Method for Coupler Calibration of Earphones

  • Compliance with IEC 61094-4:1995 Part 4: Specifications for working standard microphones

  • Compliance with GB/T 20441.4-2006 Part 4: Specifications for working standard microphones

Case Dimension Drawing of CRY319

CRY372 Measurement Microphone is a pre-polarization 1/2'' pressure-field type condenser microphone. It is mainly used for testing high-frequency response and high SPL acoustic signals. The upper limit of dynamic range is up to 160 dB. This microphone uses a titanium film as a diaphragm to ensure high stability and high accuracy in harsh environments.

CRY510 Preamplifier can be combined with a 1/2" measurement microphone for impedance conversion. With high input impedance, low output impedance, low noise, wide frequency range, and other characteristics, this preamplifier can be used in electroacoustic test systems or multi-noise detection analysis.

Case Dimension Drawing of CRY319
Case Dimension Drawing of CRY319

Case Dimension Drawing of CRY319

CRY372 Measurement Microphone is a pre-polarization 1/2'' pressure-field type condenser microphone. It is mainly used for testing high-frequency response and high SPL acoustic signals. The upper limit of dynamic range is up to 160 dB. This microphone uses a titanium film as a diaphragm to ensure high stability and high accuracy in harsh environments.

CRY510 Preamplifier can be combined with a 1/2" measurement microphone for impedance conversion. With high input impedance, low output impedance, low noise, wide frequency range, and other characteristics, this preamplifier can be used in electroacoustic test systems or multi-noise detection analysis.

Technical specification
CRY319 Ear Simulator / Coupled Cavity

Volume of coupled cavity

2cc ± 2%   

Resonant frequency

22.4kHz ± 2.5kHz

Frequency Response (FR)

125Hz~8kHz

Sensitivity ±2 dB

12.5mV/Pa 

Sensitivity ±2 dB-38dB  re 1V/Pa

Polarization voltage

0V(pre-polarization)

Upper limit of dynamic range (re 20 uPa)

160dB  

Lower limit of dynamic range (re 20uPa)

20dB(A)

Operating temperature

-30℃~80℃

Temperature coefficient (-10 ℃ - 50 ℃)

0.005dB/℃

Relative humidity range

0~90% (without condensation)

Power Supply of PreamplifierICP(2~10mA)
Connection Mode of PreamplifierSMB coaxial plug/BNC(CRY510)
Configuration checklist

CRY319 2 cc Coupled Cavity

CRY372 1/2'' Pressure-Field Measurement Microphone

CRY510 1/2'' Preamplifier

BL5706 SMB - BNC cable / 1.5 m

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