Noise Health Close
 

Figure 2. Compound (CTS) and permanent threshold shifts (PTS) versus frequencies, ranging from 2 to 32 kHz, obtained from noiseexposed rats ( n = 8 per age group). The noise was an octave band noise centred at 8kHz at (a) 92 dB or (b) 97dB SPL, 6 h/d, 5 d/w, 4 w. (c) The dark area corresponds to the 5 weeks recovery (CTS - PTS) calculated with the young rats whereas the gray area to the aged rats after the 92 dB (d) after the 97 dB noise exposure. Each point represents the mean and the bars represent the 95 % half-confidence intervals.

Figure 2. Compound (CTS) and permanent threshold shifts (PTS) versus frequencies, ranging from 2
to 32 kHz, obtained from noiseexposed rats ( n = 8 per age group). The noise was an octave band noise
centred at 8kHz at (a) 92 dB or (b) 97dB SPL, 6 h/d, 5 d/w, 4 w. (c) The dark area corresponds to the 5
weeks recovery (CTS - PTS) calculated with the young rats whereas the gray area to the aged rats after
the 92 dB (d) after the 97 dB noise exposure. Each point represents the mean and the bars represent the 95
% half-confidence intervals.