Infrasonic hearing in birds: a review of audiometry and hypothesized structure–function relationships

Zeyl, Jeffrey N.; Ouden, Olivier den; Köppl, Christine; Assink, Jelle; Christensen‐Dalsgaard, Jakob; Patrick, Samantha C.; Clusella‐Trullas, Susana

doi:10.1111/brv.12596

Cited by 26 publications

(22 citation statements)

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“…Throughout the 2020 foraging trips, 25 INFRA-EAR's have flown over the Southern Ocean to collect geophysical data. Furthermore, the INFRA-EARs are used to investigate the extent of infrasound and weather patterns in the navigation decisions by Wandering Albatrosses (Clay et al, 2020;Zeyl et al, 2020). The INFRA-EAR's have collected a total of 115 h of absolute and differential pressure data while traveling over 42,184 km.…”

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A Bird’s‐Eye View on Ambient Infrasonic Soundscapes

Ouden

Smets

Assink

et al. 2021

Geophysical Research Letters

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The Southern hemisphere is characterized by its sparsity of in situ atmospheric observations due to large ocean volumes and consequently limited landmass. Meteo-France maintains and operates meteorological measurement facilities at some of the French Sub Antarctic and Antarctic lands. The Southern Oceans weather forecasts benefits from those in situ facilities in combination with remote satellite data (ERA5 Reanalysis, 2017;Levy & Brown, 1991). This study discusses the measurement of atmospheric pressure perturbations and their variations. Those observations have shown to be valuable for studying both infrasound and gravity waves (Blanc et al., 2018;Hupe, 2019;Marlton et al., 2019). Such observations can be retrieved from microbarometer arrays that are part of the global International Monitoring System (IMS). The IMS is in place to verify the Comprehensive Nuclear-Test-Ban Treaty (CTBT; Marty, 2019), and globally monitors the infrasonic wavefield.Deep oceanic ambient noise is globally the most omnipresent seismic and infrasound source. The sea state describes the energy of the ocean surface and is the driving force for four different seismo-acoustic wave contributions (Figure 1a). (a) Evanescent microbaroms at the ocean-air interface are a direct product of traveling ocean surface waves, unregarded the water depth nor bathymetry, and decays vertically (Hetzer et al., 2010;Waxler & Gilbert, 2006). (b) The primary microseisms are related to a traveling ocean waves as well; however, these are only generated at the seafloor whenever the surface wave is in phase with the ocean bathymetry (Ardhuin et al., 2015). Non-linear interaction of counter traveling ocean surface waves results Abstract A method is introduced to reconstruct microbarom soundscapes in absolute values. The soundscapes are compared to remote infrasound recordings from infrasound array I23FR (Kerguelen Island) and in situ recordings by the INFRA-EAR, a biologger deployed near the Crozet Islands. The reconstruction method accounts for all-acoustic contributions, divided into evanescent microbaroms (detectable directly above the source) and propagating microbaroms (detectable over long ranges). It is computed by integrating acoustic intensities over the ocean surface, convolved with the transfer function quantifying the propagation losses and propagation time. The reconstructed soundscapes are found within 2.7 dB for 85% of the measurements in the microbarom band of 0.1-0.3 Hz. Infrasonic soundscapes are essential for understanding the ambient infrasonic noise field and are a basic need for applications, such as atmospheric remote sensing, natural hazard monitoring, and verification of the Comprehensive Nuclear-Test-Ban Treaty.Plain Language Summary Microbaroms are omnipresent sources of low-frequency, inaudible sound, that is, infrasound. They have a characteristic and continuous signature within the infrasound spectrum and are often classified as ambient noise. The microbarom signals can be divided into a direct signal, only detectable close by the sou...

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A Bird’s‐Eye View on Ambient Infrasonic Soundscapes

Ouden

Smets

Assink

et al. 2021

Geophysical Research Letters

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“…At the same time, female songs propagated farther and more clearly than male "cheet" notes, suggesting that female song has more broadcast function that those highly aggressive male notes. Given the similarities between human and avian sound detection thresholds, it is likely that birds have a similar perception of the effects of distance on male and female canyon wren song detectability (Dabelsteen et al, 1993;Martin, 2017;Zeyl et al, 2020). Our results fit with hypothesized links between avian song structure, function, and transmission.…”

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“…By this definition, there are now three species of birds that hear "infrasound": Pigeons (Kreithen and Quine 1979;Heffner et al 2013), domestic chickens (Hill et al 2014), and now Indian peafowl. Whether such infrasonic hearing involves different anatomical or physiological mechanisms is already under investigation (for a review, see Zeyl et al 2020). The possibility in chickens of a second mechanism has been suggested because they required additional training, especially at 32 Hz, before their final thresholds could be obtained, implying that they may perceive lower frequencies differently from higher frequencies (for details, see Hill et al 2014).…”

Section: Low-frequency Hearing In Birdsmentioning

confidence: 99%

“…Such data are needed to help us interpret the underlying anatomical and physiological mechanisms, and perhaps provide insight regarding the functions served by hearing very low frequencies (cf. Zeyl et al 2020).…”

Section: Low-frequency Hearing In Birdsmentioning

confidence: 99%

“…With so little data on low-frequency hearing in birds, there is little confidence in ideas as to why some birds hear very low frequencies, whereas others do not (e.g., Zeyl et al 2020). To begin to address the need for a broader phylogenetic and ecological sample of birds, one possibility is to examine a species thought to use low frequencies in communication.…”

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Hearing in Indian peafowl (Pavo cristatus): sensitivity to infrasound

et al. 2020

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Despite the excitement that followed the report of infrasound sensitivity in pigeons 40 years ago, there has been limited followup, with only eleven species of birds having auditory thresholds at frequencies below 250 Hz. With such sparse data on low-frequency hearing, there is little understanding of why some birds hear very low frequencies while others do not. To begin to expand the phylogenetic and ecological sample of low-frequency hearing in birds, we determined the behavioral audiogram of the Indian peafowl, Pavo cristatus. Peafowl are thought to use low frequencies generated by the males' tail feathers and wing flutters during courtship displays, and their crest feathers are reported to resonate at infrasound frequencies. The peafowl were able to respond to frequencies as low as 4 Hz, and their hearing range at 60 dB SPL extended from 29 Hz to 7.065 kHz (7.9 octaves). Removing the crest feathers reduced sensitivity at their resonant frequencies by as much as 7.5 dB, indicating a modest contribution to detectability in that range. However, perforation of the tympanic membranes severely reduced sensitivity to low frequencies, indicating that sensitivity to low frequencies is mediated primarily by the ears and cannot be attributed to some other sensory modality.

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Infrasonic hearing in birds: a review of audiometry and hypothesized structure–function relationships

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Cited by 26 publications

References 133 publications

A Bird’s‐Eye View on Ambient Infrasonic Soundscapes

A Bird’s‐Eye View on Ambient Infrasonic Soundscapes

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Hearing in Indian peafowl (Pavo cristatus): sensitivity to infrasound

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