Aihua Instruments
Aihua Instruments
CN
Measurement Microphones
Measurement Microphones Measurement Microphones Measurement Microphones
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



■  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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