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 by the same number of decibels as in part a), how many more crying babies are required?

  1. 👍 0
  2. 👎 0
  3. 👁 1,104
asked by Amanda
  1. (A_ Four babies have 4 times the intensity (sound power) as one baby. The decibel formula tells you the difference is 10 Log 4 = 6.02 dB.
    (B) It will take another factor of four times as many babies (16 in all) to raise the sound level by another 6.02 dB.

    1. 👍 0
    2. 👎 0
    posted by drwls
  2. Thanks alot. I had the right formula, i just didn't have I. Thanks again

    1. 👍 0
    2. 👎 0
    posted by Amanda

Respond to this Question

First Name

Your Response

Similar Questions

  1. 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 tripled, by how many decibels does the sound increase? due tomorrow, tuesday, april 5th,

    asked by math challenged on April 4, 2011
  2. Math

    Formula given: The decibel (dB) scale for measuring loudness, d, is given by the formula d = 10 log base ten(I X 12 to the power of 12) where I is the intensity of sound in watts per square metre. a) Find the number of decibels of

    asked by Donna on February 16, 2014
  3. Grade 12 Math Please help!!

    Please can anyone answer this which I have posted previously? Anyone with knowledge of this area of maths? Thanks in anticipation. :) Formula given: The decibel (dB) scale for measuring loudness, d, is given by the formula d = 10

    asked by Donna on February 17, 2014
  4. AP physics help

    Two identical waves undergo pure constructive interference. How is the resultant intensity related to that of the individual waves? A. resultant intensity is half of wave intensity B. resultant intensity is same as individual wave

    asked by tyger2020 on February 15, 2018
  5. 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.

    asked by Hannah on June 21, 2012
  6. PreCalculas

    The psychological sensation of loudness B is measured in decibels and is defined with reference to the intensity, , of a barely audible sound by the following equation. In this equation, I is the intensity of the sound in

    asked by Ryan on November 30, 2015
  7. 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

    asked by sara on March 27, 2012
  8. LOGS

    The decibel level of a sound is given by dB=10log(EE0), where E0=10−12wattsm2 and E is the intensity of the sound. (a) Find the intensity of a 80-decibel sound. E= watts per square meter. (b) How many times more intense is the

    asked by Sarah on February 21, 2016
  9. Physics

    This time I have two questions: #1.A recording engineer works in a soundproofed room that is 49.7 dB quieter than the outside. If the sound intensity in the room is 2.66 x 10-10 W/m2, what is the intensity outside? #2.A listener

    asked by Jena on December 5, 2006
  10. 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?

    asked by COFFEE on April 21, 2007

More Similar Questions