Compliance
IEC 61252 : 2017, IEC 61672-1: 2013 class 2, JIS C 1509-1: 2017 Class 2,
Enables measurements in compliance with ISO 9612.
Measurement functions (simultaneous measurement and processing)
Equivalent-continuous A-weighted sound pressure level LAeq
Equivalent-continuous C-weighted sound pressure level LCeq
C-weighted peak sound level LCpeak
Dose as percentage of permissible noise level exposure limit (A-weighted
sound pressure level)
Microphone
Measurement microphone (representative sensitivity: -33 dB)
Store cycle
1 s
Sound level range of measurement
Equivalent-continuous A-weighted sound pressure level 58 dB to 143 dB
Equivalent-continuous C-weighted sound pressure level 58 dB to 143 dB
C-weighted peak sound level 75 dB to 146 dB
Frequency range of measurement
20 Hz to 8 kHz
Display
Power status, measurement status, overload/under range detection,* and noise exposure displayed with LED illumination.
＊Shock detection function: When the device detects a shock exceeding the preset threshold, the LED will illuminate, and the shock vibration event will be recorded to internal memory because such shock vibrations can influence measurement results
Internal memory
Stores data for approximately 48 hours of measurement.
Power source
Rechargeable lithium ion battery (secondary battery) Continuous operating time: ≥12 hours
Operating temperature / humidity range
Temperature: -10 ℃ to 50 ℃
Humidity: 10 % to 90 % RH (no condensation)
Size and weight
85（H）×43（W）×22（D）mm, Approx. 85 g (excluding attachment holder)
Dustproof and waterproof performance
IP54 (except microphone)
Accessories
Dedicated USB cable*
Dedicated windscreen
Alligator clip holder
＊Allows settings for the NB-14 to be made from a computer and transfers measurement data to the computer. The USB cable has an NB-14-dedicated
connector on one end and a USB Type A terminal on the other end. A separate battery recharger (commercially available product) is required to recharge the NB-14
Options
Sound calibrator (NC-75)
