Simple ears inspire frequency agility in an engineered acoustic sensor system

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4 Citations (Scopus)

Abstract

Standard microphones and ultrasonic devices are generally designed with a static and flat frequency response in order to address multiple acoustic applications. However, they may not be flexible or adaptable enough to deal with some requirements. For instance, when operated in noisy environments such devices may be vulnerable to wideband background noise which will require further signal processing techniques to remove it, generally relying on digital processor units. In this work, we consider if microphones and ultrasonic devices could be designed to be sensitive only at selected frequencies of interest, whilst also providing flexibility in order to adapt to different signals of interest and to deal with environmental demands. This research exploits the concept where the “transducer becomes part of the signal processing chain” by exploring feedback processes between mechanical and electrical mechanisms that together can enhance peripheral sound processing. This capability is present within a biological acoustic system, namely in the ears of certain moths. That was used as the model of inspiration for a smart acoustic sensor system which provides dynamic adaptation of its frequency response with amplitude and time dependency according to the input signal of interest.
LanguageEnglish
Pages7298-7305
Number of pages8
JournalIEEE Sensors Journal
Volume17
Issue number22
Early online date28 Apr 2017
DOIs
Publication statusPublished - 15 Nov 2017

Fingerprint

Frequency agility
ear
Ultrasonic devices
Acoustics
Microphones
Frequency response
acoustics
sensors
Sensors
Signal processing
microphones
frequency response
signal processing
ultrasonics
moths
inspiration
Transducers
background noise
Acoustic waves
Feedback

Keywords

  • bio-inspired acoustic transducer
  • dynamic frequency adaptation
  • feedback control
  • embedded system
  • realtime signal-processing
  • moth auditory system
  • resonance frequency
  • prototyping

Cite this

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title = "Simple ears inspire frequency agility in an engineered acoustic sensor system",
abstract = "Standard microphones and ultrasonic devices are generally designed with a static and flat frequency response in order to address multiple acoustic applications. However, they may not be flexible or adaptable enough to deal with some requirements. For instance, when operated in noisy environments such devices may be vulnerable to wideband background noise which will require further signal processing techniques to remove it, generally relying on digital processor units. In this work, we consider if microphones and ultrasonic devices could be designed to be sensitive only at selected frequencies of interest, whilst also providing flexibility in order to adapt to different signals of interest and to deal with environmental demands. This research exploits the concept where the “transducer becomes part of the signal processing chain” by exploring feedback processes between mechanical and electrical mechanisms that together can enhance peripheral sound processing. This capability is present within a biological acoustic system, namely in the ears of certain moths. That was used as the model of inspiration for a smart acoustic sensor system which provides dynamic adaptation of its frequency response with amplitude and time dependency according to the input signal of interest.",
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