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Evaluation of Auditory Brainstem Response in Chicken Hatchlings
Published on: April 1, 2022
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Characterizing Sounds of Different Sources in a Commercial Broiler House
Xiao Yang1, Yang Zhao1, Hairong Qi2
1Department of Animal Science, The University of Tennessee, Knoxville, TN 37996, USA.
Animals : an Open Access Journal From MDPI
|April 3, 2021
Summary
This study characterized broiler house sounds, revealing frequency ranges for vocalizations, equipment, and behaviors like wing flapping. These findings support acoustic monitoring for improved animal health and farm management.
Area of Science:
- Agricultural Engineering
- Animal Science
- Bioacoustics
Background:
- Commercial broiler houses generate complex audio environments with sounds from birds, equipment, and behaviors.
- Established characterizations of these sound sources are lacking, hindering acoustic monitoring applications.
- Understanding sound frequencies is crucial for developing effective bioacoustic tools in poultry farming.
Purpose of the Study:
- To determine the frequency ranges of six common sound sources in commercial broiler houses: bird vocalization, fan, feed system, heater, wing flapping, and dustbathing.
- To analyze the frequencies of wing flapping (flaps/s) and dustbathing (scratches/s) behaviors across different bird ages.
- To provide foundational data for advanced acoustic analysis in broiler management.
Main Methods:
- Audio data were collected in a commercial broiler house using a microphone and a top-view camera.
- Sounds were analyzed using Maximum Overlap Discrete Wavelet Transform (MODWT) and Fast Fourier Transform (FFT).
- Frequency ranges were determined using Gaussian regression models, and behavioral frequencies were calculated from spectrograms.
Main Results:
- Frequency ranges for bird vocalizations shifted from 2481 ± 191–4409 ± 136 Hz in week 1 to 1058 ± 123–2501 ± 88 Hz by week 8.
- Fan sound frequencies increased from 129 ± 36–1141 ± 50 Hz to 454 ± 86–1449 ± 75 Hz over the growing period.
- Wing flapping frequency decreased from 17 ± 4 flaps/s (week 3) to 10 ± 1 flaps/s (week 8); dustbathing frequency decreased from 16 ± 2 scratches/s (week 3) to 11 ± 1 scratches/s (week 6).
Conclusions:
- Characterizing broiler house sounds provides essential data for acoustic monitoring of bird health and behavior.
- The identified frequency ranges and behavioral patterns can aid in developing automated farm management systems.
- Further research is needed to validate these findings across different commercial broiler house settings.
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