**Problem #17:** If two people talk simultaneously and each generates an intensity level of 65 dB at a certain point, does the total intensity level at this point equal 130 dB? Account for your answer.**Explanation:**When two sound sources combine, their total intensity levels do not simply add together like regular numbers because decibels (dB) are on a logarithmic scale. - Intensity is proportional to the power of sound.- The formula to find the total intensity level when combining sources is \( I_{\text{total}} = 10 \cdot \log_{10}(I_1 + I_2) \), where \( I_1 \) and \( I_2 \) are the individual intensities.In this problem, both sound sources produce 65 dB. The doubling of intensity results in a 3 dB increase, not a doubling of the decibel level. Therefore, when two sources each producing 65 dB are combined, the result is 68 dB, not 130 dB.

Sound loudness level (intensity in dB) due to 1 person = 65 dB Total number of persons = 2

Answered: Problem #17: If two people talk…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Describe how you would calculate the wavelengths of sounds at the extremes of the audible range, 20 and 20,000 Hz, in 60.0°C air. (Assume that the frequency values are accurate to two significant figures.)
What is the decibel level of a sound that has an intensity of 10.4 x 10-5 W/m2? Assume the standard dB level scale where the reference intensity is 1 x 10-12 W/m2
A noisy factory machine produces a sound intensity of 1.00 x 10-5 W/m2 when measured 10 m from the machine. Assume that the sound spreads out uniformly into 3 dimensions for this set of questions. What is the sound power output of the machine? (Give your answer in mW.) What is the decibel level of the machine at 10 m? At what distance is the decibel level equal to 55 dB? (Give your answer in m.)
Problem #8: The noise from a grinder in a factory is 32000 times more powerful than the noise from a dishwasher. By how many decibels is the factory noise greater than the dishwasher noise? Problem #9: A loud sound is 90 dB. When the sound is reduced to 5% of its original intensity, what is the decibel level? Problem #10: At a rock concert, a dB meter registered 130 dB when placed 2.8m in front of a loudspeaker on the stage. What is the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in air? Problem #11: By how many decibels do you reduce the sound intensity level due to a source of sound if you quadruple your distance from it? Assume that the waves expand spherically.
Suppose that a public address system emits sound uniformly in all directions and that there are no reflections. The intensity at a location 27 m away from the sound source is 3.0 X 10-4 W/m2. What is the intensity at a spot that is 80 m away?
A door bell generates a 54.0 dB sound at a close distance. What is the intensity of the sound generated by the bell at the same distance?
A dolphin is swimming at 10 metres per second towards a scuba diver. The dolphin is emitting a ‘welcome’cry which has a frequency of 2980 Hz. What is the frequency that the diver hears underwater?
Problem #4: What sound intensity level in dB is produced by earphones that create an intensity of 4.00 x 10-2 W/m2? Problem #5: What is the intensity of a sound that has a level 7.00 dB lower than a 4.00 × 10–9 W/m2 sound? Problem #6: What is the intensity of a sound that is 3.00 dB higher than a 4.00 × 10–9 W/m2 sound? Problem #7: If a large housefly 3.0 m away from you makes a noise of 40.0 dB, what is the noise level of 1000 flies at that distance, assuming interference has a negligible effect?
A concert loudspeaker suspended high off the ground emits 45 W of sound power. What is the sound intensity that reaches the an audience member 80 m away from the speaker? units: How many decibels does the audience member hear? units:
Suppose the purr of a cat has a sound intensity that is 260 times greater than the threshold level. Find the decibel level value for the cat's purr. Round to the nearest decibel.
Urgent please! A firecracker produces a power of 2.5x10-3 mw.a. What is the intensity of a firecracker at a distance of 3.00 m from thefirecracker?b. How many firecrackers would be required to produce a sound level of 120db at a distance of 5.00 m from the firecrackers?
Problem #3: What intensity level dB in does a sound of 3. 04 × 10–4 W/m2 correspond to?

SEE MORE QUESTIONS

Recommended textbooks for you

College Physics

Physics

ISBN:

9781305952300

Author:

Raymond A. Serway, Chris Vuille

Publisher:

Cengage Learning

University Physics (14th Edition)

Physics

ISBN:

9780133969290

Author:

Hugh D. Young, Roger A. Freedman

Publisher:

PEARSON

Introduction To Quantum Mechanics

Physics

ISBN:

9781107189638

Author:

Griffiths, David J., Schroeter, Darrell F.

Publisher:

Cambridge University Press

College Physics

Physics

ISBN:

9781305952300

Author:

Raymond A. Serway, Chris Vuille

Publisher:

Cengage Learning

University Physics (14th Edition)

Physics

ISBN:

9780133969290

Author:

Hugh D. Young, Roger A. Freedman

Publisher:

PEARSON

Introduction To Quantum Mechanics

Physics

ISBN:

9781107189638

Author:

Griffiths, David J., Schroeter, Darrell F.

Publisher:

Cambridge University Press

Physics for Scientists and Engineers

Physics

ISBN:

9781337553278

Author:

Raymond A. Serway, John W. Jewett

Publisher:

Cengage Learning

Lecture- Tutorials for Introductory Astronomy

Physics

ISBN:

9780321820464

Author:

Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden

Publisher:

Addison-Wesley

College Physics: A Strategic Approach (4th Editio…

Physics

ISBN:

9780134609034

Author:

Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher:

PEARSON

SEE MORE TEXTBOOKS

Problem #17: If two people talk simultaneously and each generates an intensity level of 65 dB at a certain point, does the total intensity level at this point equal 130 dB? Account for your answer.