intensity level
intensity level
intensity level
Decibel (dB) is a logarithmic unit of sound intensity Decibel is the unit of sound intensity level, not the unit of sound intensity. Unit of sound intensity is Wm-2
What is the sound intensity I that has a sound intensity level of LI = 10 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: I = Io×10^(LI/10) in W/m² = 10^−12×10^(10/10) = 10^−11 W/m².
If you think the threshold of pain is the sound intensity level of LI = 120 dB than you can convert that value to sound intensity I. 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 = 120 dB. Sound intensity I = Io×10^(LI/10) W/m² = 10^−12×10^(120/10) W/m² = 1 W/m².
Sound pressure is a power and is expressed in W/m2 (the ratio power/area unit); sound intensity level is expressed in decibels (a characteristic of the sound exposure).
Sound intensity is measured in watts per meter squared (W/m²). Sound intensity level is measured in decibels (dB). We measure sound with a SPL meter (Sound Pressure Level).
No, doubling the decibels is wrong. Total Intensity = I1 + I2. Doubling of sound intensity corresponds to a level change of 3 dB.
You will laugh: 60 dB sound intensity level is equal to 60 dB sound pressure level (SPL).
The loudness has to do with the sound field quantity called sound pressure or sound pressure level (SPL). The sound intensity or acoustic intensity means the sound energy quantity.
Given: Sound intensity level LI1 = 40 dB and sound intensity level LI2 = 20 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 I1 when entering sound intensity level LI1 = 40 dB: Sound intensity I1 = Io×10^(LI/10) W/m² = 10^−12×10^(40/10) = 0.00000001 W/m² = 10^−8 W/m². Get sound intensity I2 when entering sound intensity level LI2 = 20 dB: Sound intensity I2 = Io×10^(LI/10) W/m² = 10^−12×10^(20/10) = 0.0000000001 W/m² = 10^−10 W/m². The sound intensity I1 = 10^−8 W/m² is 100 times more than the sound intensity I2 = 10^−10 W/m². The sound intensity level LI1 = 40 dB is 20 dB more than the sound intensity level LI2 = 20 dB.