High Temperature Noise Cancellation Transducers

Request Number REQ8368350
Due Date March 16, 2018
Request for Proposal Details
RFP Title
High Temperature Noise Cancellation Transducers
RFP Description

NineSigma, representing an Equipment and Systems Manufacturer and New Technology Provider, seeks noise cancellation transducer technologies that can be adapted to operate efficiently at temperatures near 300C or greater. New developments in speakers or acoustic transducers (novel materials, disruptive technologies, or innovative methods) to achieve active high sound pressure level interference at high temperatures are of significant interest.


Noise reduction technologies have been evolving to comply with regulations for aircraft, equipment, machinery, and appliances. Active Noise Control capabilities typically utilize digital signal processing with noise-cancellation speakers, which emit an inverted phase sound wave to interfere with the sound pressure wave. Current transducers are capable of cancelling noise levels ~140-145 dB. For noise levels beyond this range, the electrical power required exceeds a standard 100 – 200 W range.


Today’s speaker technology has typically demonstrated a low efficiency (the ratio from electrical power to acoustic power), historically between 0.1% to 15%. Besides this relatively low efficiency, loudspeakers typically cannot operate in harsh environments where temperatures often reach 300 °C.


The desired outcome for this RFP is to identify new, novel, or developing technologies that can be adapted to meet the listed technical requirements.


Key Success Criteria

Technology Specifications


The successful technology would address the following criteria:

  • Effectively attenuate noise levels greater than 160 dB and frequencies between 25 Hz and 1kH.
  • Operate at temperatures around 300oC (or higher), without losing efficiency
  • Transducer enclosure must be adaptable to a small space (about 0-15 Liters volume with a constrained electrical input (0-150W); the sound/noise is transmitted through a duct.
  • System weight for any proposed approach should not exceed that of a current 8” or 10” speaker system


Possible Approaches

Possible approaches might include, but are not limited to:

  • Novel developments in acoustic transducer technologies
  • Materials improvements, new materials, or other component improvements
  • Noise dampening or sound cancelling technologies employed in industries such as aerospace or industrial applications
  • New transducer design (i.e. other mechanisms beside moving membrane to generate sound waves)
  • Low cost cooling method of an optimized speaker system


Approaches not of interest

The following approaches are not of interest:

  • Optimization of classical speaker technology, unless there are clear and significant improvements in efficiency at high temperatures (current speakers are limited to 125°C).
  • New approaches and technologies that cannot improve upon current speaker capabilities
  • Approaches that cannot be adapted for a mass market


Preferred Collaboration types
  • Joint Development
  • Contract Research
  • Technology Licensing
  • Technology Acquisition
  • Supply Agreement
Items to be submitted

Your response should address the following:

  • Non-confidential description of proposed technology and working principle
  • Availability of technical data
  • Technical maturity of the approach (concept, reduced to practice, prototype, ready to commercialize, ready to implement, commercialized)
  • Pathway to commercial scale including timing, estimated budget, and capacity for manufacture
  • Position on intellectual property including patent references
  • Desired relationship with sponsor
  • Team description and related experience


Appropriate responses to this Request

Responses from companies (small to large), laboratories, entrepreneurs, or inventors are welcome.  For example:


You represent a company, university, or laboratory that has demonstrated a proof of concept.

You represent an academic institute that has reduced method to practice at lab scale.

You represent a company that has developed a method for use at pilot scale.

You represent a urea supplier that has demonstrated a method ready for implementation at industrial scale.

You represent a technology transfer agency that represents an inventor or technology holder who can demonstrate an approach to address the request.

You represent a university research department that has a bench-scale demonstration ready to adapt.

You represent a university research department that has an undeveloped concept with a high probability of success.


Area of Interest
Request Priority
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