About Sound Calibration

What is a sound calibrator?

It is used for unit calibration of measurement microphones and confirmation of indicated value for sound level meter. Since sound pressure is afected by temperature and air pressure, it is important to use a sound calibrator before and after measurement in order to perform correct measurements. Some standards stipulate that microphones must be calibrated with sound calibrators. In addition, in JIS C 1509 and IEC 61672-1, when using a class 1 sound level meter, using a class 1 sound calibrator is required.

Important points for using calibrator

  • The calibration sound pressure level may be different depending on the type of the microphone. Be sure to check the calibration sound pressure level in the instruction manual before performing calibration.
  • A Class 1 Sound Calibrator is recommended for a Class 1 (or type 1) Sound Level Meter and microphone.
  • Periodical calibration of a sound calibrator is necessary to secure its performance. Calibration of once a year is recommended. Please contact us for more details.

 

 

Features

SC-2600

  • It conforms to JIS C 1515:2020 Class 1 and has a nominal sound pressure level of 94 dB. In addition to feedback control, it has built-in compensation functions for static pressure and temperature, allowing it to generate a stable sound pressure.
  • Recommend using this product to perform high-precision measurements using the Low-noise Microphone MI-1282M10*.
  • * A sound calibrator with a nominal sound pressure level of 94 dB is required for calibration of low-noise microphones.

 

SC-2500A

  • It conforms to JIS C 1515:2020 Class 1 and has a nominal sound pressure level of 114 dB. Using feedback control, it can generate a stable sound pressure.
  • Since it generates a high sound pressure level of 114 dB, calibration can be performed even if the measurement environment is loud such as in factories or outdoors, without being affected by the noise.

 

SC-2120A

  • It conforms to JIS C 1515:2004 Class 2 and has a nominal sound pressure level of 94 dB. It can also be used for simple operation checks.
  • It is a dynamic speaker type, cost-effective model.

 

 

Specification

Model name SC-2600 SC-2500A SC-2120A
Applicable standards JIS C 1515:2020 Class 1
IEC 60942:2017 Class 1
ANSI S1.40-2006 (R2011) Class 1
JIS C 1515:2004 Class 2
IEC 60942:2003 Class 2
Method Speaker
Compatible products 1/2-inch microphone : MI-1235/MI-1271/MI-1433/MI-1271M12/MI-1282M10
1/4-inch microphone : MI-1531*2
High performance Sound Level Meter : LA-7200/LA-7500/LA-7700
Integrating-average Sound level meter :
LA-1411/LA-1441A/LA-4441A
Ultraminiature Microphone : MB-2200M10*3
1/2-inch microphone : MI-1235/MI-1271/MI-1281*1/MI-1433
1/4-inch microphone : MI-1531*2
High performance Sound Level Meter :
LA-7200/LA-7500/LA-7700
Integrating-average Sound level meter :
LA-1411/LA-1441A/LA-4441A
1/2-inch microphone : MI-1235/MI-1271/MI-1433
High performance Sound Level Meter: LA-7200
Integrating-average Sound level meter: LA-1411/LA-1441A
Ultra-miniature Microphone: MB-2200M10*3
Sound pressure level Nominal sound pressure level : 94 dB
Deviation of sound pressure level:± 0.20 dB or less*4
Nominal sound pressure level : 114 dB
Deviation of sound pressure level:± 0.20 dB or less*4
Nominal sound pressure level : 94 dB
Deviation of sound pressure level:± 0.5 dB or less*4
Total distortion 0.5 % or less*4 0.5 % or less
Frequency Nominal frequency :1000 Hz
Frequency deviation : ± 0.1 % or less*4
Nominal frequency :1000 Hz
Frequency deviation : ± 1 % or less*4
Operating environment Air temperature : -10 to 50 °C (with no condensation)
Static pressure : 65 to 108 kPa
Relative humidity: 25 to 90 %
(Excluding a combination of air temperature and humidity that exceeds dew-point temperature of 39 °C or higher.)
Power requirement Type AA battery (LR6 or HR6) × 2 9V flat battery (6F22 or 6LR61) × 1
Battery life 10 hours or more continuous operation (when using LR6) 20 hours or more continuous operation (when using 6F22)
Outer dimensions
(not including protruded section)
84 (W) × 53 (H) × 76 (D) mm 52 (W) × 45 (H) × 130 (D) mm
Weight Approx. 220 g (including 2 battery cells) Approx. 300 g (not including battery cells)
Accessory Instruction manual (J, E, C) × 1
Type AA battery (LR6) × 2
Protection cover for coupler × 1
Instruction manual × 1
9V flat battery (6F22) × 1

*1: This product is discontinued.
*2: SC-0313 adapter attached to MI-3140 1/4-inch preamplifier is required.
*3: MB-0210  Ultraminiature Microphone Calibration Adapter (Option) is required.
*4: The value under the standard environment (reference environmental condition:air temperature: 23 °C, static pressure: 101.325 kPa, relative humidity: 50 %)

 

 

Revised:2024/05/22