Skip to main content
Fig. 2 | Journal of Occupational Medicine and Toxicology

Fig. 2

From: Powered air-purifying respirators used during the SARS-CoV-2 pandemic significantly reduce speech perception

Fig. 2

Measurement of the acoustical properties of the powered air-purifying respirator (PAPR) system. A Illustration of the PAPR system on a head and torso simulator used for measurements. B One-third octave band noise levels (dB SPL) of the PAPR system (black line) and the noise floor of the anechoic chamber (grey line). C Frequency spectrum of the sound insulation (dBr) of the PAPR calculated as difference between the transfer functions to the position of the left eardrum with and without PAPR system

Back to article page

Journal of Occupational Medicine and Toxicology

ISSN: 1745-6673