How Smooth Do You Think I Am: An Analysis on the Frequency-Dependent Temporal Roughness of Velvet Noise

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

28 Lataukset (Pure)

Abstrakti

Velvet noise is a sparse pseudo-random signal, with applications in late reverberation modeling, decorrelation, speech generation, and extending signals. The temporal roughness of broadband velvet noise has been studied earlier. However, the frequency-dependency of the temporal roughness has little previous research. This paper explores which combinative qualities such as pulse density, filter type, and filter shape contribute to frequency-dependent temporal roughness. An adaptive perceptual test was conducted to find minimal densities of smooth noise at octave bands as well as corresponding lowpass bands. The results showed that the cutoff frequency of a lowpass filter as well as the center frequency of an octave filter is correlated with the perceived minimal density of smooth noise. When the lowpass filter with the lowest cutoff frequency, 125 Hz, was applied, the filtered velvet noise sounded smooth at an average of 725 pulses/s and an average of 401 pulses/s for octave filtered noise at a center frequency of 125 Hz. For the broadband velvet noise, the minimal density of smoothness was found to be at an average of 1554 pulses/s. The results of this paper are applicable in designing velvet-noise-based artificial reverberation with minimal pulse density.
AlkuperäiskieliEnglanti
OtsikkoProceedings of the 26th International Conference on Digital Audio Effects (DAFx23)
ToimittajatFederico Fontana, Silvin Willemsen
JulkaisupaikkaCopenhagen, Denmark
KustantajaAalborg University
Sivut312-318
Sivumäärä7
TilaJulkaistu - 4 syysk. 2023
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Digital Audio Effects - Copenhagen, Tanska
Kesto: 4 syysk. 20237 syysk. 2023
Konferenssinumero: 26
https://dafx23.create.aau.dk/

Julkaisusarja

NimiProceedings of the International Conference on Digital Audio Effects
ISSN (elektroninen)2413-6689

Conference

ConferenceInternational Conference on Digital Audio Effects
LyhennettäDAFx
Maa/AlueTanska
KaupunkiCopenhagen
Ajanjakso04/09/202307/09/2023
www-osoite

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