HECOL473 Lecture 17: Lecture 17: Noise injuries

• School: University of Alberta
• Department: Human Ecology
• Course: HECOL473
• Professor: Rachel Mc Queen

Document Summary

Lecture 17: noise injuries: describe the e ect of wearing a 30db compared with a 10db attenuating hpd if the device is only worn for 50% of the time (over an 8 hour day). The closeness of the curves presented in figure 1 also shows that unless the devices are worn for almost the total time of exposure there is really very little di erence in the performance between devices. Clamping over the pressure limits capable of disrupting the blood supply around the ears. In general clamping pressures >1. 3 kpa can be expected to cause discomfort through blood ow disruption.