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In-ear，pressure，IEPE
In-ear，pressure，IEPE

CM 314+A 815

  • In-ear，pressure，IEPE

  • The pressure field artificial ear is an ear simulator that emulates the method of inserting earphone nozzles into the ear canal or pinna, simulating the coupling between earphones and the human ear to measure their acoustic performance.

    CM 314 + A 815 consists of the CM 314 pressure field artificial ear cavity and the A 815 preamplifier, which together form a pre-polarized pressure field measurement microphone kit.

    CM 314 + A 815 is positioned as a cost-effective pressure field microphone, specifically designed for audio production line testing of in-ear headphone products.

    When paired with IEPE signal conditioners such as the MegaSig PM 0083, it achieves optimal testing performance.

    The classic configuration of CM 314 + A 815 + PM 0083 + AM 581, known for its exceptional stability, has become the standard setup for most domestic and international in-ear headphone audio testing systems.

    CM 314+A 815 can be paired with AD 022 (circular chassis) + AD 021 (half-front L-shaped adapter) for desktop measurement. The complete configuration is: CM 314+A 815 + AD 022 + AD 021.


  • Description
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Description

Specifications

ParameterValue
Sound Field TypePressure field
Earphone Type入耳式
Coupler Volume/
Frequency Response20Hz – 10KHz ± 0.5dB 10KHz – 20kHz ± 1dB
Dynamic Range20dB（A）-134dB（1000 Hz THD<3%）
Noise Floor＜20dBA
Sensitivity/
StandardIEC 60318-4：2010 Ed.1.0
Operating Temperature-20°C to 60°C
Relative Humidity10- 90% no condensation

Specifications

Standard

ITU-T P.57, Type 2, IEC 60318-4:2010

Frequency range

20Hz – 10kHz ± 0.5dB  10kHz – 20kHz ± 1dB

Noise floor

<20dBA

Dynamic range

20dB（A）- 134dB（1000 Hz  THD<3%）

Sensitivity  mV/Pa(dBV/Pa)

50mV(-26dB±2dB)re 1V/Pa

Interface

BNC

Temperature range, operation

-20℃ to 60℃

Relative humidity

10 - 90% without condensation
Storage condition

Temperature：25℃±5℃，Humidity：50%±15%RH（Ensure the long-term stability of the sensor）


Frequency response

100.png


Dimensions：mm

CM 314+A 815 structural dimension drawing

CM 314+A 815-1.png

CM 314+A 815+ AD 022+ AD 021 structural dimension drawing

CM 314+A 815+ AD 022+ AD 021结构尺寸图.png

AD 022 structural dimension drawing

AD 022 结构尺寸图.png

CM 314+A 815+ AD 022+ AD 021 combination effect diagram

CM 314+A 815+AD 022+AD 021组合效果图.png

AD 022(circular chassis)combination effect diagram

AD 022 效果图.png

AD 021（half-front L-shaped adapter)combination effect diagram

AD 021效果图.png


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