Friday

October 24, 2014

October 24, 2014

Posted by **jj** on Saturday, October 9, 2010 at 9:24pm.

dB= 10log (P2/P1), where P2 is the power of a particular signal. P1 is

the power of some reference signal. In the case of sounds, the reference signal is a sound level that

is just barely audible.How many dBs does a sound have if its power is 665,000 times that of the

reference sound? Round to the nearest tenth.

A) 134.1 dB

B) 58.2 dB

C) 25.3 dB

D) 10.0 dB

E) 0.0 dB

- PreCalc -
**Reiny**, Saturday, October 9, 2010 at 9:47pmdB = 10log(665 000) = 58.23

**Answer this Question**

**Related Questions**

Telecommunications - If a Signal with a power level of 40 mW is inserted onto a ...

IT - Can someone please help me start this? Using Shannon’s formula, calculate ...

chemistry - What type of feature will be observed in the EI mass spectrum of ...

Physics - In TV picture, faint, slightly offset ghost images are formed when the...

Science - The rms(root-mean-square) value of a periodic signal s(t) is defined ...

alg - An amplifier has an input power of 5 mW. The output power is 100 mW. What ...

math - A radio station's signal has a radius of 100 miles. If you drive at a ...

engineering - Let’s suppose the message x(t) is an analog signal shown in the ...

10th grade Math - A radio station's signal has a radius of 100 miles. If you ...

Biology - Select two signal mechanisms that activate transcription in response ...