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Precision Acoustic Calibration Workstation
Precision Acoustic Calibration Workstation
 
Home > Calibration > 9350C Microphone Calibration Specifications

9350C Microphone Calibration Specifications

For Acoustic Calibrations

The Acoustic Calibration Workstation Model 9350C has been carefully designed to provide consistent, reliable and accurate microphone calibrations and conformance tests.  System verification procedures function to assure a stable, consistent operating environment and reduce systematic and random errors.

With easy, user-friendly operation and proven stepped sine excitation method, the 9350C excels in efficient, high-volume transducer calibrations, just like the manufacturers do it. The system also allows for easy integration of user-defined logos for customized calibration certificates.

SYSTEM USES

 

Microphone types calibrated

1/8", 1/4", 1/2" and 1" externally polarized (120 V and 200 V) and prepolarized condenser microphones

Microphone calibration

Open-circuit sensitivity, pressure response, 0 degree incidence free-field response, and random incidence response

Microphone calibration with preamplifier

Closed-circuit sensitivity, pressure response, 0 degree incidence free-field response, and random incidence response

Pistonphone calibration

Output sound pressure level, frequency and distortion

Preamplifier conformance check

Frequency response and gain

 

GENERAL

 

Calibration Method

Single level / single frequency insert voltage technique and Electrostatic Actuator Response (Freq. Response)

Frequency Range

20 Hz to Upper Limiting frequency of Microphone Under Test

System Accuracy (actuator response)

0.5 dB

Correction curves - supplied

PCB Piezotronics, Larson Davis, G.R.A.S., and Brüel & Kjaer microphones

Correction curves - other

Manual data entry capable into text file

Calibration data management

Yes

Automatic pass/fail classification

Yes

CE marking

Optional


REFERENCE MICROPHONE

 

Model

Brüel & Kjaer 4192

Sensitivity

12.5 mV/Pa

Frequency range

3.15 - 20,000 Hz

Dynamic range

19 - 162 dB (re. 2 x 10-5 Pa)

Polarization voltage

200 Volts


SOUND SOURCE

 

Model

Larson Davis CAL250

Sound Pressure Level

114 dB (re. 2 x 10-5 Pa)

Sound Pressure Level accuracy

+/- 0.1 dB

Frequency

251.2 Hz +/- 2 Hz

Distortion

2%

 

ENVIRONMENTAL

 

System warm-up time

30 minutes

 

ELECTRICAL

 

Main Voltage Supply

115 Volts - optional 220 Volts


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