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1 The third sound was described as a loud, crisp tapping sound. 2  The fourth sound, at pressures within 10 mmHg above the diastolic blood pressure, was described as thumping and muting. 3  The fifth Korotkoff sound is silent as the cuff pressure drops below the diastolic blood pressure.orotkoff sounds are the sounds that medical personnel listen for when they are taking blood pressure using a non-invasive procedure.
Confidence votes 4.9K. No, 10 dB is perceived to be twice as loud, and requires 10 times the power. Doubling of the volume (loudness) should be perceived by a level difference of 10 dB â psychoacousticians say.Doubling the sound pressure (voltage) level corresponds to a measured level change of 6 dB.Doubling of acoustic power (sound intensity) level corresponds to a calculated level change of 3 dB.4 decibels is about as loud as sitting 8 to 10 feet away from stereo speakers. 74 decibels is almost the same as the sound of a washing machine it is just 1 decibel higher.