Conforms to IEC 60942:2003 Class 2, JIS C 1515:2004 class 2
About Sound Calibration
♦ What is a sound calibrator?
It is necessary to ensure that the sound lever meter indicates correct sound level for correct measurement. A sound calibrator that generates predetermined sound pressure is used to check a sound level meter. There are two types of sound calibrator, piston-phone type and speaker type. They generate the sound with different sound pressure level and different frequency. They are classified based on the performance into Class 1, Class 2 etc. and the specifications are determined in the standards (JIS C 1515, IEC 60942).
♦ Important points for using calibrator
There are some important points for the proper use of a sound calibrator.
|Applicable standards||JIS C 1515:2020 Class 1*2
IEC 60942:2017 Class 1
ANSI S1.40-2006 (R2011) Class 1
|JIS C 1515:2004 Class 2
IEC 60942:2003 Class 2
|Method||Dynamic speaker||Dynamic speaker|
|Applicable microphone||1/2-inch microphone
*SC-0313 adapter attached to MI-3140 1/4-inch preamplifier is required.
|Sound pressure level||Nominal sound pressure level : 114 dB
Deviation of sound pressure level:±0.25 dB or less*
|Nominal sound pressure level : 94 dB
Deviation of sound pressure level:±0.5 dB or less*
|Total distortion||0.5 % or less||0.5 % or less|
Nominal frequency :1000 HzFrequency deviation* ±0.5 % or less*
Nominal frequency :1000 HzFrequency deviation* ±1 % or less*
|Operating environment||Air temperature : -10 to 50 ℃ (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 ℃ or higher.)
|Power requirement||Type AA battery (LR6 or HR6)× 2||9V flat battery (6F22 or 6LR61) × 1|
|Battery life||4 hours or more continuous operation (when using LR6)||20 hours or more continuous operation (when using 6F22)|
(not including protruded section)
|84 (W) × 53 (H) × 76 (D) mm||52 (W) × 45 (H) × 130 (D) mm|
|Weight||Approx. 200 g (not including battery cells)||Approx. 300 g (not including battery cells)|
|Accessory||Instruction manual × 1
Type AA battery (LR6) × ２
|Instruction manual × 1
9V flat battery (6F22) × 1
*: The value under the standard environment (standard environmental condition:air temperature: 23 ℃, static pressure: 101.325 kPa, relative humidity: 50 %)
*2: The main body display of sound calibrator will be changed from JISC 1515:2004 Class 1 to JISC 1515:2020 Class 1 from may 2020 onwards.