A food processor produces a sound level of 87dB at a distance of 1.0 m. How...

Question

Question

A food processor produces a sound level of 87dB at a distance of 1.0 m. How many watts per square metre does this sound level correspond to?

Answer 1

Answer #1

formula for sound intensity level is

beta = 10 dB log ( I/Io)

87 dB = 10 dB log ( I/Io)

I = Io * 10^87/10 = 1* 10^-12 (10^8.7) = 5.0* 10^-4 W/m^2

Answer 2

Similar Homework Help Questions

9. Sound levels are measured by the logarithmic decibel scale, named after Alexander Graham Bell. The sound level, L, corresponding to an intensity of I, in watts per square metre, is し= 10 log-, wh...

9. Sound levels are measured by the logarithmic decibel scale, named after Alexander Graham Bell. The sound level, L, corresponding to an intensity of I, in watts per square metre, is し= 10 log-, where lo is the minimum intensity audible to the human ear. If amplified rock music has a loudness of 120 dB and ordinary conversation has a loudness of 50 dB, how many times louder than ordinary conversation is amplified rock music? 9. Sound levels are measured...
A siren at a distance of 30. m produces a sound intensity of 1.0x10^-2 W/m^2. What...

A siren at a distance of 30. m produces a sound intensity of 1.0x10^-2 W/m^2. What sound level is expected from this siren at that location? A siren at a distance of 30. m produces a sound intensity of 1.0x10^-2 W/m^2. What sound level is expected from this siren at that location? 1.0x10^-1 dB 1.0 db 1.0x10^-2 dB 1.0x10^2 dB 1.0x10^1 dB
Question 11 (1 point) A siren at a distance of 30. m produces a sound intensity...

Question 11 (1 point) A siren at a distance of 30. m produces a sound intensity of 1.0x10^-2 W/m^2. What sound level is expected from this siren at that location? 01.0x10^2 dB 1.0 db 01.0x10^1 dB 1.0x10^-1 dB 1.0x10^-2 dB

he level of a sound in decibels is calculated using the formula D 10 log(x 1012)...

he level of a sound in decibels is calculated using the formula D 10 log(x 1012) where lis the intensity of the sound waves in watts per square meter. The softest sound that a human can hear has an intensity of 1012 watts per square meter. How many decibels is that?
7. A speaker produces sound with intensity level 80dB at a distance 50m. Assume it does...

7. A speaker produces sound with intensity level 80dB at a distance 50m. Assume it does emit isotropic sound waves and estimate: a) The sound power emitted by the speaker (3.14W] b) The minimum distance where its level is very high but cannot damage the ear, yet. [0.5m]
A jet produces a sound level of approximately 140 dB at a distance of 10. m....

A jet produces a sound level of approximately 140 dB at a distance of 10. m. Assuming that your ear has an effective radius of about 2.8 cm, what is the total power received by your ear? P Number Units

What is the sound intensity of a whisper at a distance of 3.0 m, in W/m^2?...

What is the sound intensity of a whisper at a distance of 3.0 m, in W/m^2? Express your answer in watts per meter squared. W/m2
1)The sound level at a distance of 1.82 m from a source is 146 dB. At...

1)The sound level at a distance of 1.82 m from a source is 146 dB. At what distance will the sound level be 50.7 dB? Answer in units of m. 2)At what distance will the sound level be 7.22 dB? Answer in units of m.
2) A referee whistle has a sound intensity level of 71.45 dB. Find the sound intensity...

2) A referee whistle has a sound intensity level of 71.45 dB. Find the sound intensity in watts per square meter for the whistle. Compare this to a sound intensity level of 126.0 dB for a loud stadium. Would you be able to hear the whistle in the stadium?

A trumpet creates a sound intensity level of 52.1 dB at a distance of 3.6 m....

A trumpet creates a sound intensity level of 52.1 dB at a distance of 3.6 m. What is the sound intensity level (in dB) of 7 such trumpets at a distance of 10.9 m?