Each 10 dB of level requires ten times the amplifier power
Evidence
The column at the far right of Figure 9.3 is an estimate of the amplifier power needed to deliver various sound levels in a typical room. Obviously, this is fundamentally dependent on loudspeaker sensitivity, how many are operating, the frequencies being radiated, and the acoustical properties of the room. In spite of these uncertainties, the relative quantities are correct—the overall vertical scale may slide up or down by a few dB. This is shown to give an appreciation for the reality that a 3 dB change in sound level requires a doubling or halving of power, and a 10 dB change, translates into ten times the power. When one is talking about high sound levels from domestic loudspeakers having typically moderate sensitivity (85–90 dB SPL at 2.83 V at 1 m), one is also talking about very large amounts of power. — Toole, Floyd E, Sound reproduction- the acoustics and…, 894
Categorization
Category: Factual Claims
Related
- Doubling perceived loudness requires a 10 dB increase. (similarity 0.93)
- Doubling loudness needs ten times the violinists (similarity 0.91)
- A 10 dB increase always doubles perceived loudness above 40 dB (similarity 0.88)
- A tenfold intensity increase is perceived as only twice as loud (similarity 0.87)
- Doubling loudness requires 10 dB, not 3 dB or 6 dB (similarity 0.86)
- Ten times as many identical sound sources are needed to double perceived loudness (similarity 0.85)
- Below 40 phon, loudness falls faster than the 10-phon-per-doubling rule predicts (similarity 0.85)
- Perceived loudness doubles with every 10 dB increase, not every 3 dB of intensity. (similarity 0.85)
- A 10 dB change roughly doubles or halves perceived loudness for complex sounds (similarity 0.84)
- Doubling pressure yields 6 dB and a tenfold increase yields 20 dB. (similarity 0.84)
- Loudness perception requires a tenfold intensity increase to double (similarity 0.84)
- Doubling sound wave amplitude quadruples the power delivered (similarity 0.83)
- A ten-phon level reduction halves perceived loudness (similarity 0.83)
- Above 10 Hz, loudness grows 10 phon per tenfold rise in repetition rate. (similarity 0.83)
- The just-noticeable difference quantifies the smallest audible change in a sound (similarity 0.83)
Broader Connections
- Doubling sound wave amplitude quadruples the power delivered
#expands(0.90) — Eric J. Heller, Why You Hear What You Hear- An…, 510 - Doubling loudness needs ten times the violinists
#exemplifies(0.85) — David Howard, Jamie Angus, coustics and Psychoacoustics, 640 - Adding equal sound intensities yields a 3 dB total increment
#expands(0.80) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1329 - A 10 dB increase always doubles perceived loudness above 40 dB
#qualifies(0.75) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 720