seewave (version 1.5.5)

rmnoise: Remove noise

Description

This function removes background noise by smoothing

Usage

rmnoise(wave, f, Sample = FALSE, ...)

Arguments

wave

a vector, a matrix (first column), an object of class ts, Sample (left channel), or Wave (left channel).

f

sampling frequency of wave (in Hz). Does not need to be specified if wave is an object of class ts, Sample, or Wave<

Sample

a logical, if TRUE returns an object of class Sample

...

other smooth.spline arguments.

Value

• A new wave is returned as a one-column matrix or as a Sample object if Sample is TRUE.

Details

This function is based on smooth.spline. You can use the arguments of the later to modify the smoothing.

See Also

afilter, noise

Examples

# synthesis of a 440 Hz sound with background noise
n <- noise(d=1,f=8000)
s <- synth(d=1,f=8000,cf=440)
ns <- n+s
# remove noise (but low frequency content still there)
a <- rmnoise(ns,f=8000)