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1/4 inch,Pressure,172dBA,IEPE

M 653+A 811

  • 1/4 inch,Pressure,172dBA,IEPE

  • M 653+A 811 is a 1/4 inch pre polarized pressure field measurement microphone used for ultra-high sound pressure level measurement, explosion sound pressure level measurement, etc.


    All microphones undergo rigorous environmental aging tests, giving them advantages such as wide frequency range, wide dynamic range, flat frequency response, and long-term stability, enabling the acquisition of ultra wideband sound source information


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Description

Specifications

ParameterValue
TEDS FunctionNo
Dimensions1/4inch
Sound Field TypePressure field
Polarization Voltage0V（Pre-polarized）
Frequency Response10 - 20kHz ±2dB 
Dynamic Range58dB（A）-172dB （1000 Hz 失真<3%）
Noise Floor58dB（A）
Sensitivity mV/Pa (dBV/Pa)0.6mV (-65.5dB) ± 3dB
IEC 61094-4 TypeWS3P
Maximum Output Voltage5.6V
Output Impedance<50Ω
Supply Power2mA - 10mA （Typical4mA）
Pressure Equalization MethodPost-equalization
Connector TypeMicordot(L5)
Operating Temperature-20°C to 60°C
Temperature Coefficient/
Humidity Coefficient/
Relative Humidity20-90% no condensation
Static Pressure Coefficient<0.003dB


Specifications

Types of Acoustic Fields

Pressure Field

Polarization voltages

0V（Prepolarized）

Frequency range

10 - 20kHz ± 2dB

Dynamic range

58dB（A）- 172dB（1000 Hz  THD<3%）

background noise

58dB（A）

sensitivity  mV/Pa(dBV/Pa)

0.6mV (-65.5dB) ± 3dB

Maximum Output Voltage

5.6V

Output Impedance

<50Ω

Power Supply

2mA - 20mA（typical 4mA）

Pressure Equalization Method

Post-equalization

Connection

Micordot(L5)

Temperature range, operation

-20℃ to 60℃

Temperature range, storage

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

Humidity range non condensing20 - 90% without condensation

Humidity coefficient

<0.003dB（250Hz, Reference temperature 40°C, Reference RH 50%）


Material

Main body

Stainless steel

Diaphragm

Nickel

Back plate

Stainless steel

Insulator

Quartz

Electret

Ptfe


Dimensions

151.png


The measuring microphones we produce are precision sensors, and all aspects related to production are strictly controlled, including material selection, production processes, testing control, and production environment.

图片1.pngAfter years of continuous improvement, we now use special nickel alloy materials as the core material for the diaphragm. Compared to other alloy materials, it exhibits higher sensitivity, lower distortion rate, and more stable long-term performance. The front body of the microphone is made of stainless steel, ensuring that the entire microphone maintains extremely robust structural characteristics even under various assembly conditions.

图片2.png

We adopt advanced production processes and fully automated precision machining equipment, which significantly reduces the accuracy errors caused by secondary clamping in traditional machining equipment. This greatly enhances the dimensional consistency, geometric accuracy, and overall quality stability of the products, providing reliable technical support for demanding application scenarios.

图片3.png

At the same time, we employ extremely rigorous testing and control measures, conducting quantitative testing on any links that may lead to product quality issues, and implementing test sequence control to prevent skip-station situations. The comprehensive MES control enables all data to be traceable, ensuring a high degree of consistency in sensor quality.

图片4.pngThe entire production process of all our microphones is strictly carried out in a dust-free workshop, which can minimize the amount of dust in the air, thus creating a stable and pure working environment for the sensors. This ensures a long and stable lifespan for the sensors and maintains their excellent performance throughout daily use.


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