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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.
click hereYou have 3 open access pages. Loud second heart sounds can be loud A2 or a loud P2. 1  loud A2 occurs in systemic hypertension where there is a dilated proximal aorta. 2  a loud P2 is heard in pulmonary hypertension. 3  a loud P2 occurs in an atrial septal defect without pulmonary hypertension.