GRAS 40PK CCP Free-field QC Microphone, Short

Freq range: 10 Hz to 20 kHz
Dyn range: 26 dB(A) to 145 dB
Sensitivity: 18 mV/Pa

Technology

Typical applications and use

  • Production-line testing of drivers, receivers, and microspeakers
  • Measurements in confined spaces

Design

The GRAS 40PK CCP Free-field QC Microphone, short is a robust, cost-effective microphone designed for use in production-line testing of loudspeakers and acoustic transducers. It has a wide frequency range reaching up to 20 kHz and a large dynamic range from

The cost-effectiveness of the 40PK is a key consideration when setting up multiple production lines. Close manufacturing tolerances provide the 40PK with a high degree of interchangeability – a major advantage when used in production-line test setups.

The 40PK is very short and can therefore be used in confined spaces where its bigger equivalent, the 40PP cannot be used. Close manufacturing tolerances provide the 40PK with a high degree of interchangeability – a major advantage when used in production-line test setups.

The standard SMB connector of the 40PK ensures an easy-to-handle setup and supports the use of standard RG174 cable all the way from the microphone to the input module.

Compatibility

The integrated CCP (Constant Current Power) preamplifier requires a constant-current power supply, such as the GRAS 12AL 1-Channel CCP Power Module with A-Weighting filter, or any other CCP compatible power supply or input module. The built-in TEDS (Transducer Electronid Data Sheet, according to IEEE 1451.4) chip provides information about the microphone that can be used by systems designed for use with TEDS.

To fully benefit from its short length, the cable with an angled SMB connector should be chosen (see the tab Ordering info).

System verification

The functionality of TEDS is very useful for determining what microphone is connected to your respective input channels. However, it is not a check of whether the microphone is within specifications or not. For daily verification and check of your measurement setup we therefore recommend using a sound source like the GRAS 42AG Multifunction Sound Calibrator.

For proper sensitivity calibration we recommend using a reference sound source like the GRAS 42AP Intelligent Pistonphone.

Specifications

Frequency range (±2 dB)
Hz
10 to 10 k
Frequency range (±3 dB)
Hz
10 to 20 k
Dynamic range lower limit with GRAS preamplifier
dB(A)
<26
Dynamic range upper limit
dB
145
Set sensitivity @ 250 Hz (±2 dB)
mV/Pa
18
Power supply (Constant Current Power)
mA
2 to 20
Microphone venting
Front
Output impedance
Ω
<50
Temperature range, operation
°C / °F
-10 to 50 / 14 to 122
Temperature range, storage
°C / °F
-40 to 85 / -40 to 185
Influence of axial vibration @1 m/s²
dB re 20 µPa
50
TEDS UTID (IEEE 1451.4)
27 v. 1.0
Connector type
SMB
CE/RoHS compliant/WEEE registered
Yes/Yes/Yes
Weight
g / oz
3.5 / 0.12346
Specification Conditions

Typical frequency response

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Dimensions

Length (incl. connector): 34 mm
Diam.: 7 mm

Ordering info

Optional items

GRAS AA0027

3 m SMB - BNC Cable

GRAS AA0082-CL

Customized Length SMB - BNC Cable

GRAS AA0078

3 m SMB angled - BNC Cable

GRAS AA0081-CL

Customized Length SMB angled - BNC Cable

GRAS AL0028

7 mm Microphone Holder, POM

GRAS AL0005

Swivel head

GRAS AL0006

Tripod

GRAS 12AL

1-Channel CCP Power Module with A-weighting filter

GRAS 12AQ

2-Channel Universal Power Module with signal conditioning and PC interface

GRAS 42AG

Multifunction Sound Calibrator, Class 1

GRAS 42AP

Intelligent Pistonphone, Class 0

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

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