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1/2inch,Free-field,16kHz,12dBA

SS 761

  • 1/2inch,Free-field,16kHz,12dBA

  • The SS 761 is an IEPE 1/2-inch pre-polarized free-field measurement microphone designed to capture undistorted true sound pressure levels before the microphone is placed in a sound field.


    The SS 761 has a unique structure with an integrated non-detachable front microphone, specifically designed for audio production line testing of multimedia and motor products.


    Paired with IEPE signal conditioners like the MegaSig PM 0083, it has become the standard configuration for audio testing systems of most domestic brands due to its exceptional stability and accuracy.


  • Description
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Description

Specifications

ParameterValue
TEDS FunctionNo
Dimensions1/2inch
Sound Field TypeFree field
Polarization Voltage0V（Pre-polarized）
Frequency Response20Hz - 10kHz ± 1dB  10Hz - 16kHz ± 2dB   10Hz - 20kHz ± 3dB
Dynamic Range12dB（A）-113dB（1000 Hz 失真<3%）
Noise Floor12dB（A）
Sensitivity mV/Pa (dBV/Pa)250mV (-12.0dB) ± 2dB
IEC 61094-4 TypeWS2F
Maximum Output Voltage3V
Output Impedance<50Ω
Supply Power2mA - 20mA（Typical4mA）
Pressure Equalization MethodPost-equalization
Connector TypeBNC
Operating Temperature-20°C to 60°C
Temperature Coefficient/
Humidity Coefficient<0.1dB（10%- 90% no condensation）
Relative Humidity<0.1dB（10%- 90% no condensation）
Static Pressure Coefficient-0.01dB/kPa


Specifications

Types of Acoustic Fields

Free Field

Polarization voltages

0V（Prepolarized）

Frequency range

20Hz – 10kHz ± 1dB  10Hz – 16kHz ± 2dB   10Hz – 20kHz ± 3dB

Dynamic range

12dB（A）-113dB（1000 Hz  THD<3%）

Background noise

12dB（A）

Sensitivity  mV/Pa(dBV/Pa)

250mV (-26.0dB) ± 2dB

Maximum Output Voltage

3V

Output Impedance

<50Ω

Power Supply

2mA - 20mA（typical 4mA）

Pressure Equalization Method

Post-equalization

Connection

BNC

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 condensing10 - 90% without condensation

Humidity coefficient

<0.1dB


Typical frequency response curve

微信图片_20240914161501.jpg


Dimensions

Overall length

85mm

Diarmete

13.2mm

Diameter (excluding protective grille)

12.7mm

Preamplifier mating threads

11.7mm - 60UNS

SS 761_尺寸.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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