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Low-Frequency-Noise Manager
Guy Gadola
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Purpose of Fully-Functional Version
Help companies and individuals comply with their own or external noise policies– Identify the cause of low frequency sound source
(e.g., train, exhaust fan, truck) from indoors– Record the sound in a database along with certain
properties– If noise is beyond accepted thresholds, then
recommended ways to mitigate noise
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Properties of Low-Frequency Sound
• “as low-frequency sound encounters less absorption as it travels through the air than higher frequency sound, it persists for longer distances”
• “the amount of sound transmitted from the outside to the inside of buildings is greater at low than at high frequencies”
http://partner.mit.edu/projects/low-frequency-noise-study
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A Building Is a Low-Pass Filter
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jAudio-Produced XML Versions for Ontology
The Outdoor Sound Is a Reference The Indoor Sound Is to Be Identified
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SIS Compares Indoor Sound to Reference XML Files
Noise Signature
nAlgorithm
SIS Testbed
NoiseID
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Screenshot from Demo
Train Identified
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Quick Start of Noise Regulation and Mitigation Technique Ontology
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Acknowledgment
Thanks go to Angen Zheng for helping me to get my SIS installation to work
References• http://partner.mit.edu/projects/low-frequency-noise-study• http://www.freesound.org• McKay, Cory, Ichiro Fujinaga, and Philippe Depalle. "jAudio: A
feature extraction library." In Proceedings of the International Conference on Music Information Retrieval, pp. 600-3. 2005.
• http://protege.stanford.edu