Table of Some Sound Sources
-
Situation
and
sound sourcesound power
Pac
wattssound power
level Lw
dB re 10−12 WRocket engine 1,000,000 W 180 dB Turbojet engine 10,000 W 160 dB Siren 1,000 W 150 dB Heavy truck engine or
loudspeaker rock concert100 W 140 dB Machine gun 10 W 130 dB Jackhammer 1 W 120 dB Excavator, trumpet 0.3 W 115 dB Chain saw 0.1 W 110 dB Helicopter 0.01 W 100 dB Loud speech,
vivid children0.001 W 90 dB Usual talking,
Typewriter10−5 W 70 dB Refrigerator 10−7 W 50 dB
Usable music sound (trumpet) and noise sound (excavator) both have the same sound power of 0.3 watts, but will be judged psychoacoustically to be different levels.
Read more about this topic: Sound Power
Famous quotes containing the words table, sound and/or sources:
“For the elemental creatures go
About my table to and fro,
That hurry from unmeasured mind
To rant and rage in flood and wind....
”
—William Butler Yeats (18651939)
“Our earth is degenerate in these latter days. Bribery and corruption are common. Children no longer obey their parents. . . . The end of the world is evidently approaching. Sound familiar? It is, in fact, the lament of a scribe in one of the earliest inscriptions to be unearthed in Mesopotamia, where Western civilization was born.”
—C. John Sommerville (20th century)
“The sources of poetry are in the spirit seeking completeness.”
—Muriel Rukeyser (19131980)