Question: At a rock concert, a dB meter registered 130 dB when placed 2.8m in front of a loudspeaker on the stage. (a) What was the

At a rock concert, a dB meter registered 130 dB when placed 2.8m in front of a loudspeaker on the stage.
(a) What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air?
(b) How far away would the sound level be a somewhat reasonable 90 dB?

Step by Step Solution

★★★★★

3.31 Rating (180 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Find the intensity from the 130 dB value and then find the power output correspondin... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

P-O-S-W (295).docx

120 KBs Word File

Students Have Also Explored These Related Oscillations Mechanical Waves Questions!

At a rock concert there are two main speakers, each putting out 500 W of sound power. You are 5.00 m from one and 10.0 m from the other. (a) What are the sound intensities at your location due to...

A fan at a rock concert is 30 m from the stage, and at this point the sound intensity level is 110 dB. (a) How much energy is transferred to her eardrums each second? (b) How fast would a 2.0-mg...

A loudspeaker at a rock concert generates 102 W/m2 at 20 m at a frequency of 1 kHz. Assume that the speaker spreads its energy uniformly in three dimensions. (a) What is the total acoustic power...

V Part A At a rock concert, a dB meter registered 130 dB when placed 2.9 m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is What...

At a rock concert, a dB meter registered 1 3 0 dB when placed 2 . 1 m in front of a loudspeaker on the stage.

At a rock concert, a dB meter registered 1 3 5 dB when placed 2 . 8 m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1 . 0 1 0 1...

At a rock concert, a dB meter registered 1 2 5 dB when placed 2 2 m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1 . 0 1 0 - 1...

At a rock concert, a dB meter registered 1 3 4 dB when placed 2 . 5 m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1 . 0 1 0 ^...

At a rock concert, a dB meter registered 1 3 5 dB when placed 2 . 9 m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1 . 0 1 0 1...

At a rock concert, a dBdB meter registered 1 3 4 dBdB when placed 2 . 1 mm in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1 . 0...

Refer to the epilepsy study data in Table 3.19. Use the data for the number of seizures after 8 weeks for the placebo patients and for the patients treated with the drug progabide to answer the...

1. Today, children are likely exposed to indecent language in various media far more often than they were in the 1970s, when the Federal Communications Commission first began to sanction indecent...

Rosa owns a lumber company and is seeking information on export opportunities. What government resource will provide Rosa with the most comprehensive information about exporting? Multiple Choice...

A study reported in the Journal of Small Business Management concluded that self-employed individuals do not experience higher job satisfaction than individuals who are not self-employed. In this...

Ms. Simms made deposits of $540 at the end of every three months into a savings account. For the first five years interest was 5% compounded quarterly. Since then the rate of interest has been 5.5%...

List and describe the five stages of a hierarchy for categorizing customer satisfaction and loyalty. Which companies that you know or deal with as a consumer create the highest form of loyalty for...

The maintenance base for Friendly Skies Airline has facilities for overhauling only one airplane engine at a time. Therefore, to return the airplanes to use as soon as possible, the policy has been...

How much interest is included in the accumulated value of $3200 paid at the end of every six months for four years if the interest rate is 6.5% compounded semi-annually?

1. Which of the following decisions must be made by all economies? a. How much to produce? When to produce? How much does it cost? b. What is the price? Who will produce it? Who will consume it? c....

A pension fund manager is considering three mutual funds. The first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a T-bill money market fund that...

In JAVA design and implement an application that determines and prints the number of odd, even, and zero digits in an integer value read from the keyboard.

A stock has a beta of 1.24 and an expected return of 12.2 percent. A risk-free asset currently earns 4 percent. What is the expected return on a portfolio that is equally invested in the two assets?...