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Fig. 8. Temporary threshold shift (TTS) as a function of noise sound pressure
differences (SPD) between the noise exposure sound pressure level (SPL) and
baseline hearing threshold SPL of birds, fish (hearing specialists only) and
mammals. Lines represent significant linear regression relationships
(TTSbirds=0.55x8.64, r2=0.36;
TTSfish=0.24x3.17, r2=0.54;
TTSmamm=0.55x57.64,
r2=0.81).