Spend half an hour in an anechoic chamber — an acoustically isolated room with surfaces designed to absorb all sound — and your hearing will have slowly ‘ turned up the volume ’ enough for you to begin to hear unfamiliar sounds originating within your own body.
ओलटन एवरॆस्ट इस अनुभव का वर्णन द मास्टर हैंडबुक ऑफ़ एकॉस्टिक्स में करता है ।