Search: Estimate the sound level in decibels you would expect at a point 8.0 from a loudspeaker connected in turn to each amp

Number of results: 14,433

physical sciences
a thunderclap 200m away delivers 3.75E^-5 W/m^2 of sound. What is the sound level in decibels? What is the intensity of the sound at 10m from the thunderclap? What is the sound level in decibels 10m from the thunderclap?
Tuesday, October 21, 2008 at 10:11pm by Valerie

Algebra
The Occupational Safety and health Administration (OSHA) estblished permissible sound exposures in the work-place. This is modeled by the equation: S=-2.817H + 108.9 Use the formula for the problem: S=maximun permissible sound level in decibels H=number of hours of exposure ...
Friday, February 8, 2008 at 12:26pm by G

Physics
The intensity due to a number of indipendent sound sources is the sum of the individual intensities. A) When four quadruplets cry simultaneously, how many decibels greater is the sound intensity level than when a single one cries? B) To increase the sound intensity level again...
Saturday, March 29, 2008 at 5:25pm by Amanda

Algebra 2
Can someone help me? I'm really confused. The loudness L of a sound in decibels is given by L= 10log(base10)R, where R is the sound's relative intensity. If the intensity of a certain sound is tripled, by how many decibels does the sound increase?
Monday, March 1, 2010 at 9:03pm by Ana

algebra 2
the loudness L of a sound in decibels is given L=10log10R, where R is the sound's relative intensity. if the intensity of a certain sound is ...
Monday, April 4, 2011 at 7:13pm by math challenged

physics
Factory Worker A is exposed to a sound of a constant intensity of 6.30 × 10–4 W m–2 at a distance of 1.00 m from a noisy machine. The frequency of the sound is 4.00 kHz. (a) What is the sound level in decibels (dB) of this sound? (b) By what factor would the ...
Sunday, June 12, 2011 at 8:45pm by nancy

physics sound
1. A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.50 s later. Find the depth of the well if the air temperature is 10.0°C. 2. Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2
Thursday, April 17, 2008 at 8:28pm by Chris Adison

college
You need to include the dimensions of the numbers you are quoting. Is the distance in meters? Is the sound level in decibels? Whatever it is, say so. A 45 dB increase in sound level is a factor of 10^4.5 = 31,620 increase in sound power per area. Use the inverse square law to ...
Thursday, March 11, 2010 at 10:45pm by drwls

Algebra
Your question: The Occupational Safety and health Administration (OSHA) estblished permissible sound exposures in the work-place. This is modeled by the equation: S = -2.817H + 108.9 Use the formula for the problem: S = maximun permissible sound level in decibels H = number of...
Friday, February 8, 2008 at 12:26pm by Guido

physics repost
Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2. F
Saturday, April 19, 2008 at 8:12pm by chris adison

Algebra II
1. A sound has an intensity of 5.92 „e 1025W/m2.What is the loudness of the sound in decibels? Use . 2. Suppose you decrease the intensity of a sound by 45%. By how many decibels would the loudness be decreased?
Wednesday, January 25, 2012 at 9:57pm by Nick

physics
1. A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.50 s later. Find the depth of the well if the air temperature is 10.0°C. 2. Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2
Friday, April 18, 2008 at 1:44pm by Chris Adison

physics repost
1. A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.50 s later. Find the depth of the well if the air temperature is 10.0°C. 2. Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2
Saturday, April 19, 2008 at 9:32am by chris adison

Math
On th decibel scale, the loudness of a sound, in decibels, is given by D=10log(I/I0), where I is the intensity of a sound barely audible to the human ear. If the intensity of a sound is 10^11I0, what is the loudness in decibels? (please note the I0 is supossed to be I lower 0.
Sunday, April 18, 2010 at 12:27pm by Help!!

Trig
decibels sound level
Saturday, April 24, 2010 at 6:32pm by Damon

Physics
Two sounds have measured intensities of I1 = 100 W/m2 and I2 = 300 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2?
Saturday, March 19, 2011 at 12:57pm by Jane

Reading Comp.
The modern hearing aid is, essentially, a miniature public-address system, which converts sound into electrical energy and then converts it back to sound again. A hearing aid can increase the sound level by sixty decibels or more, but it also distorts the sound to some extent...
Monday, March 28, 2011 at 11:02pm by Arlynn

Physics
While peforming a concert , Queen plays at average intensity levels of 2 W/m^2. Then during a sudden loud part of the music, the amplitude of the sound waves , initially A1 increases by a factor of 5. By how many decibels does the sound level increase?
Monday, June 13, 2011 at 7:50pm by Matt

physics
The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0...
Thursday, November 17, 2011 at 5:51am by maria

Physics
If one machine creates a level of 90 decibels, what decibel level would be generated by 50 of these machines? If sounds are created at random, the net intensity is found by adding the individual intensities-not the decibels. Ignore distance effects.
Wednesday, April 6, 2011 at 5:58pm by Lindsey

physics
Jane and Sam alternately pound a railroad spike into a tie with their hammers. The crew chief has a migraine, and notes that Jane's hammer blows cause a sound with intensity 5.0 times greater than the sound that Sam makes when he swings his hammer. What is the difference ...
Tuesday, April 5, 2011 at 4:33pm by shanelle james

phyiscs repost 2
Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2 For this question don't I use B=log10(I/IO) So it would be B=log10(2.25/1.0e-12) right?
Saturday, April 19, 2008 at 8:14pm by chris adison

Algebra
Find the number of decibels for the power of the sound. Round to nearest decibels. A rock concert, 5.21 x 10^-6watts/cm^2 D= dB
Saturday, November 3, 2012 at 9:34pm by CLara

physics
A stereo speaker emits sound waves with a power output of 100W. (a) find the intensity 10.0m from the source. B) find the intensity level in decibels, at this distance. C) at what distance would you experience the sound at the threshold of pain,120dB?
Tuesday, April 10, 2007 at 4:45pm by sammy

math
That sound level must correspond to a certain distance from the rocket. You don't say what it is. Sound level increases as you get closer. Use the definition of decibels. dB = 10 * log(I/1.0 x 10^-12 W/m^2) I = 2.65*10^-5 W/cm^2 = 2.65*10^-1 W/m^2 dB = 10*log(0.265/10^-12...
Sunday, March 17, 2013 at 8:58am by drwls

Physics
I am reposting this since I did so incorrectly the first time. (I apologize for posting it twice the first time as well...I accidently hit refresh) Here is the problem with the proper units: You are trying to overhear a juicy conversation, but from your distance of 15.0m , it ...
Monday, January 18, 2010 at 10:25pm by Nicole

statistics
Hearing levels or!@#$%^&pit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. Noise level is described as Low=under 88 decibels, Medium=88-91 decibels, High=92^decibels. At a = .05, is the!@#$%^&pit noise level ...
Monday, June 23, 2008 at 5:07am by Gayla

physics
What is the sound intensity level in decibels of ultrasound of intensity 10^5 W/m2, used to pulverize tissue during surgery
Tuesday, November 27, 2012 at 3:44pm by Jason

Physics
Taking a decibel to be an increase in pressure of 12.2%, by what factor has the pressure changed when the sound level has fallen by 8.00 decibels?
Thursday, November 15, 2012 at 8:26pm by Steeve

Logarithms
Show that, if one sound is 10 decibels louder than a second sound, than the first sound is 10 times as intense as the second sound.
Wednesday, March 28, 2012 at 11:36pm by Anonymous

statistics
A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviation is 4.13, how large a sample is needed to get the desired information to be accurate within 0.68 ...
Tuesday, November 2, 2010 at 9:02pm by Valerie

physics - sound level
The source of a sound wave has a power of 2.50 µW. Assume it is a point source. (a) What is the intensity 6.70 m away? I used I = Power / 4*pi*r^2 and found I to be 4.43x10^-9 W/m^2 (b) What is the sound level at that distance? Sound level = 10 dB*log [(Intensity)/(...
Saturday, April 21, 2007 at 12:54am by COFFEE

statistics
A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviation is 4.02, how large a sample is needed to get the desired information to be accurate within 0.58 ...
Friday, September 2, 2011 at 9:48pm by Laynette

Physics
A speaker at an open-air concert emits 600 of sound power, radiated equally in all directions. a)What is the intensity of the sound 7.00 from of the speaker? I =0.974 W/m^2 b) What sound intensity level would you experience there if you did not have any protection for your ...
Monday, May 28, 2012 at 3:36pm by JessicaP

Grade 12 Advanced Functions Math
Hello! Can someone please help me out for this question? The loudness, L, of a sound in decibels can be calculated using the formula L= 10 log(I/ F) where I is the intensity of the sound in watts per square metre and F= 10^ -12 . A singer is performing to a crowd. Determine ...
Tuesday, January 19, 2010 at 12:06am by Joan

Physics
1) I = E/(A*t)= (2.5*10^-11J)/[(6.7*10^-4 m^2)(4.62s)] = 8.1*10^-9 W/m^2 That would be about 39 decibels... not very loud. A soft conversation is about that loud. 2) Use the equation I = Pmax^2/(2*density*V) where V is the sound speed. Solve it for Pmax, the pressure amplitude...
Monday, November 22, 2010 at 4:27am by drwls

Pre Calculus 12
Solving problems that involve logarithms the sound at a rock concert decreases by 10% for every 5m travvelled. how far does it take for a volume of 2000 decibels to decrease to 20 decibels? i dont know what to do for this one the growth decay formula i got is A = P(X)^t/n I ...
Wednesday, January 23, 2013 at 8:23pm by Shreya

Algebra 2
What do you mean by ^three times as loud" ? If loudness is a measure of power per area, then the amplitude has to be higher by the square root of three. To the ear, this will correspond to about 4.8 decibels more of sound level, not "three times as much".
Friday, May 6, 2011 at 2:44pm by drwls

physics
Since the sond level is less than the reference(1Watt), the answer will be negative. If the sound level was 1Watt, the answer would be 0db. If the sound level was greater than 1 Watt, the answer would be positive. a. 10Log(P2/P1) = 10Log(6.3*10^-4W/1W) = 10 * (-3.2) = -32db. b...
Sunday, June 12, 2011 at 8:45pm by Henry

chemistry
A sound power level reading of 127 dB was taken near a construction site where chippers were being used. When all but one of the chippers stopped working, the sound power level reading was 120 dB. Estimate the number of chippers in operation when the reading of 127 was ...
Tuesday, April 26, 2011 at 1:09am by Massiel

algebra
A sound power level reading of 127 dB was taken near a construction site where chippers were being used. When all but one of the chippers stopped working, the sound power level reading was 120 dB. Estimate the number of chippers in operation when the reading of 127 was ...
Tuesday, April 26, 2011 at 12:31am by Massiel

science (physics)
1) Why is frequency an element needed in the sound industry? and 2) When there is a sound pressure level of two different sources with different frequencies, why do sound pressure levels have to be determined in each seperate frequency? 1) The sound industry sells equipment ...
Thursday, September 21, 2006 at 12:23am by Kat

Math
Log functions: A new car has an interior sound level of 70 dB at 50 km h. A second car, at the same speed, has an interior sound level that is two times more intense than that of the new car. Calculate the sound level inside the second car.
Friday, May 27, 2011 at 12:55am by Aimee

Science
I`m a 5th grade student and we are haviing a Sound Science test.I`m looking for defenitions to study from.such as vibrations, decibels, frequency and questions dealing with sound travel. is there a site you could recomend? thank you, cassidy
Wednesday, February 24, 2010 at 9:00pm by Cassidy

Functions
Problem solving with logarithmic functions: A new car has an interior sound level of 70 dB at 50 km h. A second car, at the same speed, has an interior sound level that is two times more intense than that of the new car. Calculate the sound level inside the second car.
Thursday, May 26, 2011 at 9:39pm by Aimee

physics
You did not use the correct logarithmic formula that relates decibels to intensity. To review it, see: http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/sound/u11l2b.html At 39.2 dB, the sound intensity level is 10^3.92 = 8318 times above the reference (hearing threshold) value...
Tuesday, December 2, 2008 at 12:44am by drwls

Physics(Please help)
The intensity (in W/m2) of one sound is 4.83 times as great as the intensity of another sound. Relative to the quieter sound, what is the intensity level â of the louder sound? I am not sure how to start this. Thank you.
Thursday, June 21, 2012 at 6:47pm by Hannah

alg 2
The sound level in decibles, B, can be found using the equation B=10 log(I/10^-12). what is the sound intensity when the decible level is 90? pleaseeeeeeeeeeee helppppppppppppppppppp
Monday, June 16, 2008 at 11:44pm by URGENT!!!!!!!!!

physics
A grade-school teacher insists that the the overall sound level in his classroom not exceed 64 dB at his location. There are 25 students in his class. If each student talks at the same intensity level, and they all talk at once, what is the highest sound level at which each ...
Tuesday, April 5, 2011 at 4:32pm by chris giordano

PHYSICS!!!
By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
Wednesday, December 1, 2010 at 5:51pm by Molly

PYSCIS!!!!
By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
Wednesday, December 1, 2010 at 5:50pm by Molly

College Physics
(20)^2 = 400 times the sound power (at the mother's ear) = how many decibels?
Thursday, November 1, 2007 at 2:44pm by drwls

physics
NEED HELP WITH ONLY PART C Two 135.1.0-W speakers, A and B, are separated by a distance D = 3.6 m. The speakers emit in-phase sound waves at a frequency f = 11800.0 Hz. Point P1 is located at x1= 4.50 m and y1 = 0 m; point P2 is located at x2 = 4.50 m and y2 = –y. a) ...
Tuesday, March 27, 2012 at 9:27pm by sara

Physics- Elena please help!
An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. (a) What is the sound intensity during the day ? (Reminder: If you choose to use ...
Wednesday, December 5, 2012 at 6:26pm by Mary

Physics
(Sound Intensity) = (Energy)/[(Area)*(Time)] It can be converted to decibels using a logarithmic formula, if that is what they want.
Sunday, November 21, 2010 at 5:07pm by drwls

physics
The sound power will be reduced to 40% of the original value. Sound is measured in logarithmic units of decibels. 10 dB are a factor of 10 in power. In this case, the sound power is reduced not that much. In your case, dB reduction = 10 Log(10)2.5 = 4.0 dB The new reading will...
Tuesday, March 29, 2011 at 1:16pm by drwls

physics
The quality of a musical tone has to do with a variety of which of the following? A) amplitudes.B) sound speeds.C) intensities.D) decibels.E) harmonics.
Monday, April 30, 2012 at 7:03pm by Jim

Physics: Waves in Media
By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
Tuesday, December 7, 2010 at 12:52pm by Amanda

Physics
You're at a concert at a distance of 10m away from the band and their sound level is 120dB. How far back do you have to move if you want the sound level to be 85 dB? I tried using 85=(10/r1)^2, but this doesn't seem to be working.
Wednesday, October 22, 2008 at 12:08am by Ziyi

Physics
1. What is the intensity of a sound at the pain level of 120 dB? 2. What is the intensity level of a sound whose intensity is 2.0 x 10^-6 W/m^2?
Saturday, May 29, 2010 at 11:14am by Amber

statistics
Suppose that in the aerobic exercise group we also measured the number of hours of aerobic exercise per week and the mean is 5.2 hours with a standard deviation of 2.1 hours. The sample correlation is -0.42. a)Is there evidence of a significant correlation between number of ...
Saturday, November 26, 2011 at 11:46am by natasha

math
2.58*10^(-5)watts/cm2 find the number of decibels for the power of the sound given. Round to the nearest decibel.
Sunday, February 10, 2013 at 11:47pm by Andrzej

Algebra
Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.3 10-6 watts/cm2
Friday, August 3, 2012 at 7:55pm by Deb

algebra
Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.4 10-6 watts/cm2
Sunday, October 30, 2011 at 4:36am by suzie

physics
1. Solve (a+V)/(a-V) = 0.8 a is the speed of sound, and V is the car's speed. 2. The person who can hear the lower 5 dB level has better hearing, by 20 dB. That is a factor of 100 times less in sound power level
Sunday, May 17, 2009 at 11:43am by drwls

biostatistics
7. Consider again the data in problem #6. Suppose that in the aerobic exercise group we also measured the number of hours of aerobic exercise per week and the mean is 5.2 hours with a standard deviation of 2.1 hours. The sample correlation is -0.42. a)Is there evidence of a ...
Saturday, November 26, 2011 at 10:51am by natasha

Physics SOUND
What is the resultant sound level when an 80-dB and an 85-dB sound are heard simultaneously?
Saturday, May 3, 2008 at 1:48am by Anonymous

Physics- PLEASE HELP
An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. Late at night, the traffic flow is only 7 cars per minute. (b) What is the sound ...
Thursday, December 6, 2012 at 7:56pm by Anonymous

algebra
Find the number of decibels for the power of the sound. round to the nearest decibel. A rock concert, 5.35x 10^4 watts/cm^2
Tuesday, July 24, 2012 at 1:48pm by Nancy

Physics- Elena please help!
An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. Late at night, the traffic flow is only 7 cars per minute. (b) What is the sound ...
Thursday, December 6, 2012 at 5:52pm by Anonymous

algebra
find the number of decibels for the power of the sound. round to nearest decibel. a rock concert 5.34*10^-6 watts/cm^2 D= Db
Wednesday, October 24, 2012 at 10:52am by missfubu-c

ALGEBRA
Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.21 multiplied by 10-6 watts/cm2
Monday, April 16, 2012 at 10:35am by Randy

8th grade science
The loudness of sound can be measured in decibels. Do you think loudness is a vector or not? Can you explain why or why not.
Wednesday, March 23, 2011 at 1:01am by Kallie

science grade 7
-80 decibels more than or less than -20 decibels??
Monday, October 29, 2012 at 3:58am by rawr... im a dinosaur.... rawr

math
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^-5 watts/cm^2
Sunday, March 17, 2013 at 8:58am by Andrew

math
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.65 times 10^-5 watts/cm^2
Saturday, March 16, 2013 at 10:55pm by Andrew

Math
Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.19 10-6 watts/cm2 D= ? db
Friday, July 15, 2011 at 9:56am by Lee Ann

math
A random sample of the houses in a particular city is selected and each of the houses in a particular city is selected and each of the house's level of radon gas is measured. The values collected are given in the table below in parts per million (ppm). 4 8 13 6 7 3 9 8 11 ...
Sunday, February 1, 2009 at 9:56pm by helga

Physics - okay, turns out I need help once more
but this is the last problem, so I'll be done after thins one. :) You're at a concert at a distance of 10m away from the band and their sound level is 120dB. How far back do you have to move if you want the sound level to be 85 dB? I tried using 85=(10/r1)^2, but this ...
Tuesday, October 21, 2008 at 11:08pm by Ziyi

algebra
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine,2.44 cross 10^(−5)watts/cm2.
Sunday, May 12, 2013 at 8:47pm by Tierra

Math
Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.35 10-6 watts/cm2 D =______ dB
Tuesday, October 30, 2012 at 8:48pm by Ms. Jackie

math
Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.36 multiplied by 10-6 watts/cm2 D = mark dB
Thursday, October 20, 2011 at 2:30pm by Anonymous

physics
A loudspeaker is placed between two observers who are 111 m apart, along the line connecting them. If one observer records a sound level of 51.9 dB and the other records a sound level of 82.5 dB, how far is the speaker from each observer?
Tuesday, November 30, 2010 at 5:44pm by Linda

physics
A loudspeaker is placed between two observers who are 114 m apart, along the line connecting them. If one observer records a sound level of 61.6 dB and the other records a sound level of 81.3 dB, how far is the speaker from each observer?
Tuesday, December 2, 2008 at 12:43am by Anonymous

Physics of Sound
For a speaker whose sound power output is 140 dB, the distance from the speaker at which the sound level will be reduced to 85 dB is ?
Thursday, October 25, 2012 at 3:39pm by Kristen

physics
1.) The average sound intensity inside a busy neighborhood restaurant is 3.*10^-5 W/M^2. How much energy goes into each ear (area = 2.1 * 10^-2 m^2) during a one hour meal? 2.) A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity ...
Sunday, December 12, 2010 at 11:23pm by David

PHYSICS
At 25 m from a sound source, the intensity level is 55 dB. What's the level at distance of 56m? What's the level at distance of 273m?
Monday, July 16, 2012 at 2:00am by jR

physics
A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 355. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 72 dB. What sound intensity level would the crew member ...
Saturday, December 3, 2011 at 6:27pm by Marco

Physics
As measured from centre ice, a single wildly cheering hockey fan can produce a sound intensity level of 60dB. What sound intensity level would be produced by 20 000 cheering fans? --------- If sound waves travel through the ground with an average speed of 6150 m/s and a ...
Tuesday, May 15, 2012 at 8:21pm by HelpMeWithPhysics

Physics HELP!!
A loudspeaker is placed between two observers who are 113m apart, along the line connecting them. If one observer records a sound level of 51.8dB and the other records a sound level of 75.8dB, how far is the speaker from each observer? Enter the longest distance first.
Friday, November 30, 2012 at 10:18pm by Angie

STUPID PHYSICS
As measured from centre ice, a single wildly cheering hockey fan can produce a sound intensity level of 60dB. What sound intensity level would be produced by 20 000 cheering fans? --------- If sound waves travel through the ground with an average speed of 6150 m/s and a ...
Tuesday, May 15, 2012 at 4:07pm by HelpMeWithPhysics

physics
At a distance of 7.5 m from a point sound source, the sound intensity level is 105 dB. At what distance is the intensity level 90 dB?
Friday, April 13, 2012 at 11:46am by Anonymous

Physics - sound
When wearing proper ear protection, a jack hammer operator experiences a sound intensity of 1x10^-6 W/m2. The ear protection purpots to reduce the sound intensity by 100 times. What is the actual sound level of the jack hammer?
Saturday, January 15, 2011 at 1:46pm by Anonymous

physics
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m 0.75 m. The sound intensity level is 95 dB above the threshold of hearing. How much sound energy comes through the window in one hour?
Sunday, January 13, 2013 at 3:32pm by not sure

College Physics
A vacuum cleaner has a measured sound level of 75.7 dB. What is the intensity of this sound? Answer in units of W/m^2
Tuesday, December 7, 2010 at 11:35pm by Tammi

physics
An electronic point source emits sound isotropically at a frequency of 3000 Hz and a power of 34 watts. A small microphone has an area of 0.75 cm2 and is located 158 meters from the point source. a) What is the sound intensity at the microphone ? To find intensity i tried I=...
Wednesday, April 21, 2010 at 11:45pm by caleb

Sound engineering
A Question of engineering about Sound. How to calculate in step by step? Thank you. The octave bands¡¦ Sound pressure levels in dB re 20 £g Pa are: Hz 57 129 220 420 1K 2K 4K 8K dB 85 95 90 80 88 70 68 72 What is the overall A-weighted sound pressure level?
Thursday, February 28, 2013 at 12:05am by Kelvin

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