Evaluation of Field Tests for a MIMO ANC System Used in a Fishing Boat

• The sound levels in the sleeping quarters and the mess-room of fishing boats are sometimes too high. It is especially important to keep the sound levels down since the crew have to spend several days on the boat. This implies a long exposure time to low frequency noise. Even during sleep the crew does not have a hearing rest. It is therefore of interest to decrease sound levels in specific areas to give the crew hearing rest. The advantage with an ANC system is that it can be used as a retrofit kit, and the installation does not force the owner to keep the boat in the harbor for long times, compared to a passive treat of the noise problem. In order to evaluate how much sound level decrease it is possible to achieve, a volumetric ANC system has been tested. The typical fishing boat is equipped with one main engine. The engine is typically mounted using a passive isolation, but this does not decrease the sound levels enough. A brief review and discussion of the background noise situation are made in this paper. Since the boat has one engine, a single reference, multiple input, multiple output active noise control system, SR-MIMO ANC, was used using loudspeakers and microphones and an adaptive system based on a DSP. The SR-MIMO ANC system consists of one reference signal, four loudspeakers and six microphones. The results from a field test are presented in the paper and the results are commented.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

Noise abatement

Control system analysis

Digital signal processing

Vibration control

Adaptive control systems

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)