The NA-28 is an advanced sound level meter,
Class 1, featuring 1/1-octave and 1/3-octave
analysis functions as standard.
1/1-octave and 1/3-octave analyses can be
performed simultaneously (simultaneous display),
significantly reducing the time required for
measurement and analysis.
The NX-28BA option (sold separately)
enables measurement of acoustic indicators
mainly required for building materials, such as
floor and wall sound insulation performance,
reverberation time, and NC values for room noise assessment.
Measurement data is stored on a memory card
and can be processed and edited using
dedicated PC software AS-60.
The device complies with various standards,
such as IEC 61672-1 : 2013 Class 1,
JIS C 1516 : 2020 Class 1, and
JIS C 1509-1 : 2017 Class 1.