The SV 977D is a Class 1 Sound and Vibration meter designed for building acoustics, occupational noise and environmental noise measurements. The meter is a successor of SVAN 977A offering new 1/2” microphone MK255 offering wide frequency range from 3 Hz and excellent long-time stability of sensitivity.  The SV 977D has a built-in Bluetooth® interface for wireless connection with with smart-phone applications like Building Acoustics Assistant that extends measurement capabilities dedicated for building acoustics.

One unique feature of the SV 977D is ultrasound measurement band up to 40 kHz. The ultrasound band is normally considered as the frequency range above 20 kHz. Ultrasound is used in a number of industrial processes such as cleaning, drilling or welding as well as hospitals for medical procedures.

The SV 977D can be also used as the vibration level meter – simply by connecting a cable and a vibration sensor.

The new SV 973 class 2 sound level meter, and the SV 971A class 1 sound level meter are two new generation models that comply with IEC 61672. They have a small size and weight as well as improved application compatibility via mobile apps, which is their main feature.