Skip to main content

Free Content Sound Intensity Mapping to Synthesize and Rapidly Optimize the Reduction of Machinery Noise Emission

Sound intensity scanning measurements were used to rapidly design an optimum package to reduce noise emission from a semi-trailer mounted refrigeration unit. The scans were taken with and without enclosures to identify the individual sources causing noise peaks in normal operation. Scanning gave us sound power level as the target metric to reduce emissions, independent of the test environment and microphone location, unlike standard sound pressure level measurements. This also allowed the synthesis of additional combination treatments, specifically, combinations not practical to measure, due to time constraints, using power difference. It gave us a quick and precise path to the optimized treatment package, with sound power nearly halved (a 2.5dB level reduction, which is a 44% reduction in radiated sound power).

Document Type: Research Article

Affiliations: E-A-R Thermal Acoustic Systems, Aearo Technologies LLC

Publication date: 10 November 2017

More about this publication?
  • The Noise-Con conference proceedings are sponsored by INCE/USA and the Inter-Noise proceedings by I-INCE. NOVEM (Noise and Vibration Emerging Methods) conference proceedings are included. All NoiseCon Proceedings one year or older are free to download. InterNoise proceedings from outside the USA older than 10 years are free to download. Others are free to INCE/USA members and member societies of I-INCE.

  • Membership Information
  • INCE Subject Classification
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content