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Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone-4949
Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone-4949-b
Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone-Hottinger Brüel & Kjær

Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone
Hottinger Brüel & Kjær

Hottinger Brüel & Kjær's Response Status

Response Rate

100.0%

Response Time

22.7hours

Relatively Fast Response


About This Product

Type 4949 -type surface microphone is ideal for precision surface sound pressure and is particularly suitable for car applications. Since the 4949 type can be installed directly on the body surface of the car, it is ideal for measurement in a wind tunnel test or in a narrow space such as a car firewall or bottom.

■ Usage examples

・ Measurement of noise on the glass surface and narrow space ・ Wind tunnel test ・ Low to medium sound pressure level of noise measurement ・ Flash mount (composition of the surface) ・ Connect to CCLD input By using the optional mount pad, you can easily attach a microphone when the body surface is curved. Although small, the 4949 type is a durable and stable micro hone. All metal parts, including microphone housing, diaphragm and back plate, are made of titanium, ensuring very high corrosion resistance. To minimize the wind noise of the microphone itself, the diaphragm is located on the same side as the microphone housing. The static equalization vent is located right next to the diaphragm on the front of the microphone. This arrangement is important because the micro hon is exposed to the turbulent pressure fluctuation. The 4949 -type surface microphone has a built -in Deltat loan team to connect to CCLD input. The sensitivity of the microphone is optimized to ensure a good noise floor and measure high sound pressure levels without clipping. Micro hons are compatible with IEEE 1451.4 (TEDS), recognizing microphones from afar and can read the proofreading sensitivity. The 4949 type surface microphones are based on the new microphone technology. With this technology, you can get uniform and high stability like microphones and preamplifiers.

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    Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone

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2 Models of Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone

Click on the part number for more information about each product

Image Part Number Price (excluding tax) sensitivity Sensitivity (250Hz) Frequency response (sound pressure sound field) Lower frequency (–3db) Pressure adjustment vent Diacphram co -amal frequency number Equivalent air volume Correction by Type 4228 with DP 0977 or DP 0979 Self -noise Maximum operating range Clipping limit Constant current supply Supply voltage (when no load) Bias voltage Maximum output voltage Maximum output current Output impedance Estimated long -term stability Operating temperature range Storage temperature Temperature coefficient (250Hz) Atmospheric pressure coefficient (250Hz) Operation humidity range Humidity impact Vibration sensitivity (<2kHz) Micro hon unit diameter Micro hon unit height Microphone unit weight
Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone-Part Number-4949

4949

Available upon quote

11.2 MV/PA

--39 DB ± 3 DB RE 1 V/PA, 11.2 MV/PA

10Hz to 10kHz ± 1db Re 250Hz, 5Hz to 20kHz ± 3db Re 250Hz

0.5 Hz to 5 Hz

Front vent (diaphragm end)

24kHz, representative value (90 ° phase shift)

6.8mm^3 ± 0.8mm^3 (2σ)

0.00db

<9 µV, linear 22.4Hz ~ 22.4kHz, representative value: 6 µV, A characteristics, equivalent conversion SPL 8.9 µV, Linear 22.4Hz ~ 22.4kHz, 32dB public sensitivity equivalent SPL

> 140db SPL (500Hz, 3%distortion)

> 144db Re 20 µPa Peak (7V Peak maximum sensitivity)

Deltatron power supply 2MA to 20ma, nominal 4MA

+ 22V to + 30V DC, minimum 18V for limited specifications

12.7V ± 1.3V

> 7v Peak

1 mA or less of peak value supply current

<50Ω 1kHz, 22Ω 430PF representative value

<0.001db/20 ° C: <50% RH, <0.025dB/20 ° C: <90% RH, <0.5b/month 100 ° C

–30 to +100 ° C (--22 to +212 ° f)

–30 to +70 ° C (--22 to +158 ° f)

+ 0.013db/℃

--0.007db/KPA

0 ~ 100% RH dew condensation

<0.1db No condensation

1m/s^2:65 DB, etc.

20mm (0.79 ″)

2.5mm (0.1 ")

2.3g (0.08 Oz.) Not included cable

Ideal for precision surface sound pressure measurement 4949 type automotive surfaces Microphone-Part Number-4949-b

4949-b

Available upon quote

11.2 MV/PA

--39 DB ± 3 DB RE 1 V/PA, 11.2 MV/PA

10Hz to 10kHz ± 1db Re 250Hz, 5Hz to 20kHz ± 3db Re 250Hz

0.5Hz to 5Hz

Front vent (diaphragm end)

24kHz, representative value (90 ° phase shift)

6.8mm^3 ± 0.8mm^3 (2σ)

0.00db

<9 µV, linear 22.4Hz ~ 22.4kHz, representative value: 6 µV, A characteristics, equivalent conversion SPL 8.9 µV, Linear 22.4Hz ~ 22.4kHz, 32dB public sensitivity equivalent SPL

> 140db SPL (500Hz, 3%distortion)

> 144db Re 20 µPa Peak (7V Peak maximum sensitivity)

Deltatron power supply 2MA to 20ma, nominal 4MA

+ 22V to + 30V DC, minimum 18V for limited specifications

12.7V ± 1.3V

> 7v Peak

1 mA or less of peak value supply current

<50Ω 1kHz, 22Ω 430PF representative value

<0.001db/20 ° C: <50% RH, <0.025dB/20 ° C: <90% RH, <0.5b/month 100 ° C

–30 to +100 ° C (--22 to +212 ° f)

–30 to +70 ° C (--22 to +158 ° f)

+ 0.013db/℃

--0.007db/KPA

0 ~ 100% RH dew condensation

<0.1db No condensation

1m/s^2:65 DB, etc.

20mm (0.79 ″)

2.5mm (0.1 ")

2.3g (0.08 Oz.) Not included cable

Click on the part number for more information about each product

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About Company Handling This Product

Response Rate

100.0%


Response Time

22.7hrs


Company Review

5.0

Company Overview

HBK, formerly named HBM, is a global ISO9001 and ISO14001-certified company founded in 1950. It is known for p...

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