Auditory effects of noise

Effect of noise on humans

Figure 1 - Different types of noise according to the decree of August 12, 1975

Figure 3 - Equal nuisance curves

Figure 4 - 40-nucleus isonuisance curve

Figure 5 - Comparison of PNdB, dBA, dBC evaluation of three spectra with same NR index [1]

Figure 6 - Variation in hearing loss with exposure level [2]

Figure 7 - Average hearing loss as a function of exposure time [3]

Figure 8 - Temporary hearing loss in dB (TTS) as a function of frequency, after exposure to 115 dB white noise for 20 minutes [4]

Figure 9 - TTS after exposure to pure tones [5]

Figure 10 - Variation in the percentage of subjects in the same population recognized as having a hearing loss, according to the hearing loss evaluation formula. [7]

Figure 11 - Simplified diagram of the physiological mechanisms involved in a stress situation

Figure 12 - Changes over time in circulating levels of catecholamines and glucocorticoids following a mild aggression such as exposure to a new environment or shearing in sheep. [8]

Figure 13 - Differences in the percentages of occurrence of various physiological disorders as a function of noise level [9]

Figure 14 - Impact of noise on hypertension [10]

Figure 16 - Variation in the production level of a repetitive manual dexterity task as a function of ambient noise intensity [12]

Figure 17 - Effect of noise level on postal sorting efficiency (after Kovrigin, Mikheyev, 1965)

Figure 18 - Simplified diagram of the Broadbent model [13]

Figure 19 - Diagram of the short-term memory &#34;acquisition-restitution&#34; cycle [14]

Figure 20 - Behavioral activation theory