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Aihua Instruments
Aihua Instruments
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Aihua Instruments
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Measurement Microphones
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Measurement Microphones
All 'AIHUA' Measurement Microphones are assembled in a clean room to ensure that the microphones maintain their inherent low noise floor and high stability, even when used in environments with a combination of high humidity and high temperature.
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Key Features Product Uses Technical Specifications
Key Features



■  high-precision and high stability            

■  Low ambient temperature coefficient                

■  High resistance to humidity

Product Uses


■  Precision sound measurement

■  Premium class sound level meters

■  Equipment complying with IEC 61672 class 1/ Class 2

Technical Specifications

    Model

    14403

    14404

    14407

    14421

    14424D

    14423

    14425

    14435

    Diameter

    1/2"

    1/4"

    Open Circuit Sensitivity: mV/Pa

    15

    25

    30

    50

    40

    4

    Dynamic Range (dB) *

    30～150

    25～145

    21～142

    24～153

    17～140

    18～140

    40～160

    Frequency Range (Hz)

    20～40,000

    20～12,000

    10～16,000

    20～12,500

    10～16,000

    10~20,000

    10～16,000

    20～20,000

    Capacitance at 250 Hz (pF)

    18

    18

    18

    17

    15

    18

    16

    8

    Ambient Temperature Coefficient (dB/°C)

    0.01

    0.01

    0.01

    0.02

    0.015

    0.015

    0.015

    0.02

    Polarization Voltage (V)

    200

    0

    Venting

    Rear

    Dimensions

    IEC 61094-4  Type WS2

    IEC 61094-4  Type WS3

    Operating Temperature

    -20 °C ～ +70 °C

    -20 °C ～ +60 °C

    Humidity

    25 % ～ 90 %(RH)

    Atmospheric Pressure

    65 kPa ～108 kPa

    Frequency Response Characteristic          

    Free field

    Pressure

    field

    Free field

    Pressure

    field

    Free field

    Pressure

    field


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Aihua Instruments
Aihua Instruments
Aihua Instruments No.37 Xianxing Rd Xianlin Town Yuhang District Hangzhou Zhejiang China Aihua Instruments +86 571 85021931 Aihua Instruments yqf@hzaihua.com
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