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Fig. 1. The power spectra of the 170 dB re 1 µPa white noise used for noise-exposure experiments. The top curve shows the spectrum as recorded directly from the MiniDisc player. The bottom curve shows the spectrum as recorded by a hydrophone placed centrally within the noise-exposure bucket. The spectrum measured within the noise-exposure aquarium is similar to that of the bucket, so it is omitted for clarity.





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