How to analyze and manipulate nonlinear phenomena in voice recordings DOI Open Access
Andrey Anikin, Christian T. Herbst

Published: April 24, 2024

We address two research applications in this methodological review: starting from an audio recording, the goal may be to characterize nonlinear phenomena (NLP) at level of voice production or test their perceptual effects on listeners. A crucial prerequisite for work is ability detect NLP acoustic signals, which can then correlated with biologically relevant information about caller and listeners’ reaction. are often annotated manually, but labor-intensive not very reliable, although we describe potentially helpful advanced visualization aids such as reassigned spectrograms phasegrams. Objective features also useful, including general descriptives (harmonics-to-noise ratio, cepstral peak prominence, vocal roughness), statistics derived dynamics (correlation dimension), NLP-specific measures (depth modulation subharmonics). On perception side, playback studies greatly benefit tools directly manipulating recordings. Adding frequency jumps, amplitude modulation, subharmonics relatively straightforward. Creating biphonation, imitating chaos, removing a recording more challenging, feasible parametric synthesis. most promising algorithms analyzing provide detailed examples files R code supplementary materials (https://osf.io/gs8u3/).

Language: Английский

How to analyse and manipulate nonlinear phenomena in voice recordings DOI Creative Commons
Andrey Anikin, Christian T. Herbst

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 380(1923)

Published: April 3, 2025

We address two research applications in this methodological review: starting from an audio recording, the goal may be to characterize nonlinear phenomena (NLP) at level of voice production or test their perceptual effects on listeners. A crucial prerequisite for work is ability detect NLP acoustic signals, which can then correlated with biologically relevant information about caller and listeners’ reaction. are often annotated manually, but labour-intensive not very reliable, although we describe potentially helpful advanced visualization aids such as reassigned spectrograms phasegrams. Objective features also useful, including general descriptives (harmonics-to-noise ratio, cepstral peak prominence, vocal roughness), statistics derived dynamics (correlation dimension) NLP-specific measures (depth modulation subharmonics). On perception side, playback studies greatly benefit tools directly manipulating recordings. Adding frequency jumps, amplitude subharmonics relatively straightforward. Creating biphonation, imitating chaos removing a recording more challenging, feasible parametric synthesis. most promising algorithms analysing provide detailed examples files R code supplementary material. This article part theme issue ‘Nonlinear vertebrate vocalizations: mechanisms communicative functions’.

Language: Английский

Citations

5
Gharial acoustic signaling: Novel underwater pops are temporally based, context‐dependent, seasonally stable, male‐specific, and individually distinctive DOI Creative Commons

J. M.,

Jeffrey W. Lang

Journal of Anatomy, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Abstract Gharials ( Gavialis gangeticus ) produce a sudden, high amplitude, pulsatile, underwater sound called POP. In this study, gharial POPs ranged from 9 to 55 ms, and were clearly audible on land water, at ≥500 m. only performed by adult males possessing sex‐specific, cartilaginous narial excrescence, termed the ghara. We recorded 130 POP events of seven wild in 115 km stretch Chambal River during 2017–2019, using hydrophones aerial mics. A event occurs when male produces single or double triple POP, each with specific duration timing. was incorporated into complex, multi‐modal breathing display, typically breeding season. Key features novel signal are documented here for first time. These include its incorporation complex reliance temporal rather than spectral elements, dependence social context, stability within an individual, individually distinctive patterning particular male. The display consisted sub‐audible vibrations (SAV) preceding then stereotyped exhalation–inhalation–exhalation sequence, concluding bubbling submergence. our 96% variation parameters explained timings (92%) number (4%), 2% related features. Each setting. Two behavioral contexts examined: ALERT PATROL. identities examined Discriminant Function Analysis (DFA). Within exhibited patterns that context‐specific denoted male's identity his location. stable individual males, 1 year next. Overall, showed specific, minimal overlap amongst yet these remarkably diverse. stereotypy patterns, based versus frequency difference best characterized statistically DFA metrics, Beecher's Information Statistic, MANOVA, Score computations. Our field observations indicated audiences gharial, located nearby, and/or distance, responded immediately orienting direction. Extensive auditory studies crocodylians indicate their capacity discrimination neural processing relation locating target is par birds. How produced broadcast loudly both water air has received little study date. briefly summarize existing reports ghara anatomy, ontogeny, paleontology. Finally, preliminary made clear zoo enclosure jaw claps entirely sounds. Simultaneous bubble clouds emanating base suggestive cavitation phenomena associated loud volume sounds such as shrimp snaps seal/walrus claps. discuss likelihood plays essential role production non‐vocal sexually dimorphic acoustic unique gharial.

Language: Английский

Citations

0
Cold-blooded culture? Assessing cultural behaviour in reptiles and its potential conservation implications DOI Creative Commons
Anna Wilkinson, Stephan A. Reber, Holly Root‐Gutteridge

et al.

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 380(1925)

Published: May 1, 2025

It is becoming clear that the cognition of a species plays an important role in successful conservation, with cultural processes being fundamental part this. However, contrast to mammals and birds, very little known about (and social learning underlies these) reptiles. Here, we summarize current state knowledge, consider why this information so limited assess candidate behaviours observed wild, which warrant further investigation through lens traditions. We then make suggestions for next steps necessary start address issue. This includes future experimental work also consideration how existing datasets, such as those capturing animal movement or acoustic activity, can be used questions. In addition, emphasize engaging key conservation stakeholders, zoos, aquaria ecotourism providers, could play furthering our understanding behaviour group potential implications knowledge. Whether there reptiles relationship has remain unclear; however, findings review suggest these are areas worthy research.This article theme issue 'Animal culture: changing world'.

Language: Английский

Citations

0
How to analyze and manipulate nonlinear phenomena in voice recordings DOI Open Access
Andrey Anikin, Christian T. Herbst

Published: April 24, 2024

We address two research applications in this methodological review: starting from an audio recording, the goal may be to characterize nonlinear phenomena (NLP) at level of voice production or test their perceptual effects on listeners. A crucial prerequisite for work is ability detect NLP acoustic signals, which can then correlated with biologically relevant information about caller and listeners’ reaction. are often annotated manually, but labor-intensive not very reliable, although we describe potentially helpful advanced visualization aids such as reassigned spectrograms phasegrams. Objective features also useful, including general descriptives (harmonics-to-noise ratio, cepstral peak prominence, vocal roughness), statistics derived dynamics (correlation dimension), NLP-specific measures (depth modulation subharmonics). On perception side, playback studies greatly benefit tools directly manipulating recordings. Adding frequency jumps, amplitude modulation, subharmonics relatively straightforward. Creating biphonation, imitating chaos, removing a recording more challenging, feasible parametric synthesis. most promising algorithms analyzing provide detailed examples files R code supplementary materials (https://osf.io/gs8u3/).

Language: Английский

Citations

2