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2018 | OriginalPaper | Chapter

14. Frequency Filters

Author : Jérôme Sueur

Published in: Sound Analysis and Synthesis with R

Publisher: Springer International Publishing

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Abstract

Indications are provided to apply frequency filters to remove unwanted sounds according to frequency. This covers filters with predefined frequency transfer functions, as the preemphasis and Butterworth filters, and filters which cutoff frequencies can be defined by the user, that is, filters based on the short-time Fourier transform and finite impulse response (FIR) filters.
Audio files:Allobates_​femoralis.​wavAlytes_​obstetricans.​wavhello.​wavnoise.​wavpeewit.​wav

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previous chapter Frequency and Energy Tracking
next chapter Other Modifications
Footnotes
1
A preemphasis filter can also be built with the function filter() of the package signal as implemented in the function melfcc(): filter(x, filter = c(1, -alpha), method = ‘‘convolution,’’ sides = 1, circular = FALSE).
 
Literature
Butterworth S (1930) On the theory of filter amplifiers. Exp Wirel Wirel Eng 7:536–541
Speaks CE (1999) Introduction to sound. Singular Publishing Group, San Diego/London
Metadata
Title
Frequency Filters
Author
Jérôme Sueur
Copyright Year
2018
Publisher
Springer International Publishing
Book
Sound Analysis and Synthesis with R

Print ISBN: 978-3-319-77645-3

Electronic ISBN: 978-3-319-77647-7

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-77647-7_14

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