Noise treatment of 80 dB resulted in a significant elevation of heterophil to lymphocyte ratio indicating stress response of the broilers. Noise treatment of both 70 and 80 dB intensities also resulted in a significant elevation of basophil granulocytes (Bedanova et al., 2010). Chloupek et al. (2009) simulated slaughterhouse sounds to which broilers were exposed for 10 min in the test room. Noise stimuli of both 80 dB and 100 dB intensities induced a highly significant elevation in the plasma corticosterone level in broilers when compared to the control birds. McFarlane and Curtis (1989) reported that continuous noise for seven days at the level 80 or 95 dB did not have a significant effect on the plasma corticosterone concentration of broiler chickens. The noise during transport increased heart and breathing rates, and secretion of stress hormone of poultry (Oh et al., 2011).