lowpass

* Anti-alias lowpass filter conjugated with resampler.

AvaxHome RSS: 2009

This work revealed “a clear manifestation of the Medieval Warm Period” between AD 1000 and 1250, the peak warm-season temperature of which “smoothed with a 40-year lowpass Butterworth filter” was clearly higher than it was at the end of the 20th century.

Loso: Varves in Alaska « Climate Audit 2007

Thick line shows the same record smoothed with a 40-yr lowpass Butterworth filter.

Loso: Varves in Alaska « Climate Audit 2007

All series were smoothed with a 40-year Hamming-weights lowpass filter, with boundary constraints imposed by padding the series with its mean values during the first and last 25 years.

The Maestro is in da house « Climate Audit 2007

This work revealed “a clear manifestation of the Medieval Warm Period” between AD 1000 and 1250, the peak warm-season temperature of which “smoothed with a 40-year lowpass Butterworth filter” was clearly higher than it was at the end of the 20th century.

Unthreaded #8 « Climate Audit 2007

While these correlation were performed with raw, unfiltered data, for clarity the tree-ring record in Figure 7B has been smoothed with a 10-yr lowpass filter and is presented in sigma units standard deviations from the chronology mean.

Loso: Varves in Alaska « Climate Audit 2007

That said, normally, a filter operation does not subtract the output from the input in such a manner, i.e. a highpass filter would be used to remove the low frequencies, and a separate lowpass filter would be used to remove the high frequencies .

Wilson et al 2007 « Climate Audit 2007

The ring modulator is (a cluster of related) modifier(s), the lowpass filter is another.

more contact samples badger 2006

Current Music: throb...throb...like a sine-wave lowpass filter

[film] Be Here to Love Me: A Film About Townes Van Zandt badger 2006

In signal processing land, we simply take high and lowpass pairs, ala dyadic wavelets or quadrature mirror filters, to create orthogonal frequency banks.

Splicing in Rutherford et al 2005 « Climate Audit 2006