A study has shown that loud noise simulating noisy ventilation fans and operational machines found at slaughterhouses led to increased plasma corticosteroids, cholesterol and total protein.

This study recommended the control of noise pollution near the chickens and chicks.

Other studies show that noise levels past the 85 dB level can lead to a decreased feed intake of between 15 to 25%. Lower feed intake stunts chicken growth - something the poultry farmer or processor does not want.

This episode is also available as a blog post: https://zaszambia.wordpress.com/2021/06/27/effects-of-noise-on-commercial-poultry-birds/