Onomo Outdoor NOise MOnitoring system

Smart noise measurements


Onomo is a product of a joint project between Tampere University of Technology, VTT Technical Research Centre of Finland and University of Eastern Finland. Onomo provides intelligent noise measurements for various type of auditory scenes. The system is capable of classifying noise sources and thus will give more accurate measurement of real noise produced by the target site. This page is a visualization front-end for the prototype system.

Continous measurement

The prototype system is currently collecting continuous sound pressure level measurements at a rock-crushing site located in Eurajoki, Finland. The system consists of laptop and a measurement microphone. Sound pressure level measurement are done in 10 minute intervals and mobile network is used to transfer the measurement data to the server.

Noise source classification

The noise source classification system classifies the measurements into three classes: one containing mostly sound from the target (e.g. rock-crushing), one containing mostly normal environmental sounds and one containing mostly abnormal sounds. Abnormal sound are the sounds which do not belong to any of the two other classes. By classifying the signal into segments, the sound pressure level measurements can be better targeted.


Tampere University of Technology
Audio Research Team
Tuomas Virtanen (tuomas.virtanen@tut.fi)
VTT Technical Research Centre of Finland
Panu Maijala (panu.maijala@vtt.fi)

University of Eastern Finland
Environmental Informatics
Mika Raatikainen (mika.raatikainen@uef.fi)

Web site

2.2.3 (17.9.2014)
Toni Heittola / TUT (toni.heittola@tut.fi)