Doubling sound wave amplitude quadruples the power delivered

Evidence

What is so remarkable about the doubling of the amplitude? After all, it should be louder if the previously lost sound is reflected toward us. The crucial point is that the energy and power in the wave is proportional to the square of the amplitude. This means that the power reaching the audience is not twice, but four times what it would have been without the wall! — Eric J. Heller, Why You Hear What You Hear- An…, 510

Categorization

Category: Factual Claims

Related

• Power quadruples when amplitude doubles, since power scales with amplitude squared (similarity 0.91)
• Only part of loudspeaker input power becomes sound energy (similarity 0.84)
• Each 10 dB of level requires ten times the amplifier power (similarity 0.83)
• Doubling loudness needs ten times the violinists (similarity 0.83)
• Ten times as many identical sound sources are needed to double perceived loudness (similarity 0.82)
• A-weighted sound power ratios overestimate perceived loudness differences in noise emissions. (similarity 0.81)
• Walls and corners near a sound source increase its power output (similarity 0.81)
• Doubling perceived loudness requires a 10 dB increase. (similarity 0.81)
• Reflections from a nearby hard wall can double the sound amplitude toward the listener (similarity 0.81)
• A nearby wall doubles a source’s radiated power via reflected amplitude (similarity 0.80)
• Doubling loudness requires 10 dB, not 3 dB or 6 dB (similarity 0.80)
• Frequency-dependent acoustic power output is a loudspeaker’s most audible performance aspect (similarity 0.80)
• A tenfold intensity increase is perceived as only twice as loud (similarity 0.80)
• Loudness is not reducible to sound pressure level or signal power (similarity 0.80)
• Doubling pressure yields 6 dB and a tenfold increase yields 20 dB. (similarity 0.80)