NEVA Associates

DuPont LoWave Acoustic Material with Low-Frequency attenuation case study


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A major U.S. manufacturer of laboratory equipment was concerned that one of its newest pieces of equipment would not gain widespread acceptance in the marketplace due to its high overall noise level and unpleasant sound quality. Company officials needed to improve the sound signature of the equipment improving the comfort level of people working around it, without altering product design in a way that would eliminate valuable laboratory space.

Representatives were pleased to learn that DuPont was in the process of introducing DuPont LoWave acoustic material; a new high-performance product designed to help solve difficult acoustical challenges from both broadband noise and the low-frequency tones often generated by mechanical equipment such as compressors, chillers, fans, motors and generators.


  • In the company’s equipment, the sound emitted from the motor and fan assembly enclosed in a typical metal housing was measured at 78 dB(A) and had significant low frequency sound levels.
  • Reduce the measured noise level of 78 dB(A) by 8 to 10 dB(A).
  • Reduce the sound pressure level (SPL) at frequencies below 250 Hz.
  • Achieve reduction in noise level and improvement in sound quality without altering equipment design.
  • Maintain adequate air circulation around the fan to prevent the equipment from overheating.

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