46 Embedded Active Control Systems in Passive Silencers*

Supervisors:

Dr Ben Cazzolato & Dr Anthony Zander

Moderator:

 

Number of Students:

2 students - Mechanical or Mechatronic.

Description:

Fantech are ``Australia's leading supplier of Ventilation & Acoustic products''. They manufacture a large range of circular duct silencers which are designed to reduce the noise levels transmitted along air conditioning systems. The units are rigidly constructed and consist of an outer cylindrical galvanised steel casing, lined internally with non-hygroscopic and incombustible sound-absorbent material. This material is retained by an inner perforated metal cylinder. They are often fitted with a centre ``pod'' of perforated metal, retaining an infill of acoustic material.

Unfortunately these silencers have very poor low frequency performance. The purpose of this project will be to investigate the feasibility of using feedback control to increase the sound transmission loss (absorption) at low frequencies.

For further information on Fantech visit:
Fantech Website http://www.fantech.com.au/ and the following documents Design brief from Fantech level4projects2002/active_final_yr_proj-design_brief.pdf, Typical ventilation fan level4projects2002/AP0504AP10-DRAWING.PDF, Typical ventilation fan data level4projects2002/AP0504AP10-25.PDF and Typical silencer data C1P-050.pdf.

Comments:

IP limitations.

Industrial Sponsor:

Fantech