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Animals : an open access journal from MDPI2023; 13(18); 2970; doi: 10.3390/ani13182970

Selected Acoustic Frequencies Have a Positive Impact on Behavioural and Physiological Welfare Indicators in Thoroughbred Racehorses.

Abstract: (1) Background: Since antiquity, it is considered that sounds influence human emotional states and health. Acoustic enrichment has also been proposed for domestic animals. However, in both humans and animals, effects vary according to the type of sound. Human studies suggest that frequencies, more than melodies, play a key role. Low and high frequencies, music tuning frequency and even EEG slow waves used for 'neurofeedback' produce effects. (2) Methods: We tested the possible impact of such pure frequencies on racehorses' behavior and physiology. A commercial non-audible acoustic stimulus, composed of an array of the above-mentioned frequencies, was broadcasted twice daily and for three weeks to 12 thoroughbred horses in their home stall. (3) Results: The results show a decrease in stereotypic behaviors and other indicators such as yawning or vacuum chewing, an increase in the time spent in recumbent resting and foraging, and better hematological measures during and after the playback phase for 4 of the 10 physiological parameters measured. (4) Conclusions: These results open new lines of research on possible ways of alleviating the stress related to housing and training conditions in racehorses and of improving physical recovery.
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Publication Date: 2023-09-20 PubMed ID: 37760370PubMed Central: PMC10525862DOI: 10.3390/ani13182970Google Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This study makes an exploration into whether specific acoustic frequencies can have a positive effect on the behavior and physiology of thoroughbred racehorses. The researchers found that exposing horses to a specially composed low and high-frequency sound stimulus helped reduce stress-related behaviors and improved physical indicators.

Background

  • The research starts from the basis that certain types of sounds and frequencies can impact the emotional states and health of both humans and animals. This is premised on historical knowledge that sound can significantly affect moods and wellbeing.
  • Human studies referenced in the paper suggest that it is not necessarily melodies but specific frequencies that play a vital role in these effects. The particular frequencies in question are the low and high frequencies, music tuning frequencies, and EEG slow waves used for ‘neurofeedback’.

Methods

  • The study sought to examine the effects of such frequencies on thoroughbred racehorses’ behaviors and physiology. The researchers used a commercial non-audible acoustic stimulus containing an assortment of these frequencies.
  • With a sample size of 12 horses, the acoustic stimulus was broadcasted twice daily for three weeks while the animals were in their home stall.

Results

  • Post exposure to the acoustic frequencies, the study observed significant behavioral changes in the horses. Specifically, they noted a reduction in stereotypic behaviors, such as yawning or vacuum chewing. These behaviors are often associated with stress and anxiety in horses.
  • Concurrently, the research also found an increase in time spent in recumbent resting and foraging, indicating perhaps a calmer state of the creatures.
  • Moreover, there were measurable physiological improvements; better hematological parameters were recorded during and after the playback phase for 4 out of the 10 parameters measured.

Conclusions

  • From these findings, the research concludes that certain acoustic frequencies can positively affect behavior and physiological states in thoroughbred racehorses.
  • Such outcomes suggest that it’s possible to mitigate stress related to housing and training conditions in racehorses and enhance physical recovery through the application of specific sound frequencies.
  • This opens new lines of research in animal welfare, with the understanding that acoustic influences can play a part in improving the quality of life for domestic animals, particularly in intensive care or high-stress environments like competitive racing.

Cite This Article

APA
Gueguen L, Henry S, Delbos M, Lemasson A, Hausberger M. (2023). Selected Acoustic Frequencies Have a Positive Impact on Behavioural and Physiological Welfare Indicators in Thoroughbred Racehorses. Animals (Basel), 13(18), 2970. https://doi.org/10.3390/ani13182970

Publication

Animals : an open access journal from MDPI
ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 13
Issue: 18
PII: 2970

Researcher Affiliations

Gueguen, Léa
  • Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)-UMR 6552, 35000 Rennes, France.
  • UMR 8002 Integrative Neuroscience and Cognition Center, CNRS, Université Paris-Cité, 75006 Paris, France.
Henry, Séverine
  • Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)-UMR 6552, 35000 Rennes, France.
Delbos, Maëlle
  • Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)-UMR 6552, 35000 Rennes, France.
Lemasson, Alban
  • Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)-UMR 6552, 35000 Rennes, France.
  • Institut Universitaire de France, 75005 Paris, France.
Hausberger, Martine
  • Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie Animale et Humaine)-UMR 6552, 35000 Rennes, France.
  • UMR 8002 Integrative Neuroscience and Cognition Center, CNRS, Université Paris-Cité, 75006 Paris, France.

Grant Funding

  • LS251470 / Excelessens society

Conflict of Interest Statement

The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

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