Given: Sound intensity level LI = 150 dB.
Reference sound intensity Io = 10^−12 W/m² (Threshold of hearing)
Reference sound intensity level LIo = 0 dB-SIL (Threshold of hearing level)
Get sound intensity I when entering sound intensity level LI = 150 dB:
I = Io×10^(LI/10) in W/m² = 10^−12×10^(150/10) = 1000 W/m².
Given: Sound intensity level LI = 70 dB.
Reference sound intensity Io = 10^−12 W/m² (Threshold of hearing)
Reference sound intensity level LIo = 0 dB-SIL (Threshold of hearing level)
Get sound intensity I when entering sound intensity level LI = 70 dB:
I = Io×10^(LI/10) W/m² = 10^−12×10^(70/10) = 0.00001 W/m².
This is not really loud- something louder than ordinary conversational speech, but somewhat less loud than a vacuum cleaner.
This the approximate sound level of an ordinary conversation at about 1.5m separation.
Reference sound intensity Io = 10^−12 W/m² (Threshold of human hearing). Reference sound intensity level LIo = 0 dB-SIL (Threshold of human hearing intensity level). The sound intensity I is measured in watts per meter squared. The sound intensity LI level is measured in decibels (dB).
The sound pressure of 45 dB is about a quiet library and 50 dB is about an everage home.
If you would like to measure how loud the sound is, dB, decibels, would be good. To give you a rough idea, a whisper is about 30 dB, a baby crying loudly about 100 dB. Also, if you like to measure the frequency or the wavelength, you can use Hertz.
That's the sound of the Earth disintegrating.
You take a measuring microphone with a sound pressure level meter.
(90 dB - 70 dB) = 20 dB = 100 times as much sound power.(100 times 'as much' = 99 times 'more')
A normal conversation is about 70 decibels (dB). A gun firing off is about 140 dB.
90 > 70
The concert Db (meaning, the sounding Db, like it would sound on the piano) is Bb. The instrument's Db is C#.
If you would like to measure how loud the sound is, dB, decibels, would be good. To give you a rough idea, a whisper is about 30 dB, a baby crying loudly about 100 dB. Also, if you like to measure the frequency or the wavelength, you can use Hertz.
The 40dB sound is (40 - 20) = 20 dB louder than the 20 dB sound.20 dB louder = 10(20/10) = 102 = 100 times louder
The Sound of Music - The dB's album - was created in 1987.
60 dB sound pressure level is about conversational speech listened in 1 meter distance.
70 dB is 10 times louder than 60 dB.
The power in the wave is [ 30 dB = 1,000 times ] greater.
Decibels (dB)
If you would like to measure how loud the sound is, dB, decibels, would be good. To give you a rough idea, a whisper is about 30 dB, a baby crying loudly about 100 dB. Also, if you like to measure the frequency or the wavelength, you can use Hertz.