Allows easy measurement of airborne sound in buildings (D value, L value etc.), and floor impact sound insulation performance measurement with a single instrument. JIS and ISO compliant measurements and evaluation index calculation can also be performed with the NA-28 itself. Data can be saved as text files, allowing use of an Excel macro for index calculation. In addition, if the waveform recording card NX-28WR is also used, simultaneous sound pressure level waveform recording during measurement is also possible.

Supported Technical Standard / Law / Regulation
●ISO 140-5:1998 Acoustics — Measurement of sound insulation in buildings and of building elements — Part 5: Field measurements of airborne sound insulation of facade elements and facades
●ISO 16032:2004 Acoustics — Measurement of sound pressure level from service equipment in buildings — Engineering method