ArticleSensors (Basel, Switzerland)2020
Assessment of Laying Hens' Thermal Comfort Using Sound Technology.
Article in Sensors (Basel, Switzerland), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
22 citing papers in PubMed, 1 synthesis or guideline pooled it, 70 citations in OpenAlex.
- AI-Powered Vocalization Analysis in Poultry: Systematic Review of Health, Behavior, and Welfare Monitoring.Sensors (Basel, Switzerland) · 2025Pooled it
- Multidomain feature fusion for recognizing chicken vocalizations under heat stress.Poultry science · 2026Article
- Brains, quacks, and boojums: a review of neurotransmitter and neuroendocrine bases of welfare and enrichment in poultry with an emphasis on the Pekin duck.Poultry science · 2026Review
- Impact of Huoxiang Zhengqi oral liquid on the performance, egg quality, antioxidant capacity via reshaping gut microbiota in laying hens under acute heat stress.Poultry science · 2026Article
- Two-stage acoustic detection and fine-grained classification of laying-hen vocalizations for heat-stress monitoring.Poultry science · 2026Article
- Refined THI Models for Evaluating the Effects of Heat Stress on Egg Production in Thai Native and Black-Boned Chickens.Animals : an open access journal from MDPI · 2026Article
- Identification and characterization of clusters of potentially new vocalizations in broiler chickens using advanced acoustic analysis.Poultry science · 2025Article
- Decoding laying hen behavior and physiological status through acoustic biomarkers: temporal patterns, rooster-hen vocalization identification in group housing and environmental adaptation.Poultry science · 2025Article
- Decoding Poultry Welfare from Sound-A Machine Learning Framework for Non-Invasive Acoustic Monitoring.Sensors (Basel, Switzerland) · 2025Article
- Laying Hens: Why Smothering and Not Surviving?-A Literature Review.Animals : an open access journal from MDPI · 2024Review
- Enhancing poultry health management through machine learning-based analysis of vocalization signals dataset.Data in brief · 2023Article
- Opportunities for Regulatory Authorities to Assess Animal-Based Measures at the Slaughterhouse Using Sensor Technology and Artificial Intelligence: A Review.Animals : an open access journal from MDPI · 2023Review
- Assessing Indoor Climate Control in a Water-Pad System for Small-Scale Agriculture in Taiwan: A CFD Study on Fan Modes.Bioengineering (Basel, Switzerland) · 2023Article
- Bioclimatic Zoning for Sheep Farming through Geostatistical Modeling in the State of Pernambuco, Brazil.Animals : an open access journal from MDPI · 2023Article
- Sex Detection of Chicks Based on Audio Technology and Deep Learning Methods.Animals : an open access journal from MDPI · 2022Article
- Automated identification of chicken distress vocalizations using deep learning models.Journal of the Royal Society, Interface · 2022Article
- Progress on Infrared Imaging Technology in Animal Production: A Review.Sensors (Basel, Switzerland) · 2022Review
- Leveraging SOLOv2 model to detect heat stress of poultry in complex environments.Frontiers in veterinary science · 2022Article
- Increases in extreme heat stress in domesticated livestock species during the twenty-first century.Global change biology · 2021Article
- Transforming the Adaptation Physiology of Farm Animals through Sensors.Animals : an open access journal from MDPI · 2020Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
Abstract
Heat stress is one of the most important environmental stressors facing poultry production and welfare worldwide. The detrimental effects of heat stress on poultry range from reduced growth and egg production to impaired health. Animal vocalisations are associated with different animal responses and can be used as useful indicators of the state of animal welfare. It is already known that specific chicken vocalisations such as alarm, squawk, and gakel calls are correlated with stressful events, and therefore, could be used as stress indicators in poultry monitoring systems. In this study, we focused on developing a hen vocalisation detection method based on machine learning to assess their thermal comfort condition. For extraction of the vocalisations, nine source-filter theory related temporal and spectral features were chosen, and a support vector machine (SVM) based classifier was developed. As a result, the classification performance of the optimal SVM model was 95.1 ± 4.3% (the sensitivity parameter) and 97.6 ± 1.9% (the precision parameter). Based on the developed algorithm, the study illustrated that a significant correlation existed between specific vocalisations (alarm and squawk call) and thermal comfort indices (temperature-humidity index, THI) (alarm-THI, R = -0.414, P = 0.01; squawk-THI, R = 0.594, P = 0.01). This work represents the first step towards the further development of technology to monitor flock vocalisations with the intent of providing producers an additional tool to help them actively manage the welfare of their flock.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.