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

The decibel (dB) is defined as

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

## Answer This Question

## Related Questions

- Telecommunications - If a Signal with a power level of 40 mW is inserted onto a ...
- chemistry - What type of feature will be observed in the EI mass spectrum of ...
- IT - Can someone please help me start this? Using Shannon’s formula, calculate ...
- Physics - In TV picture, faint, slightly offset ghost images are formed when the...
- physics - The driver of a train traveling at 30 m/s applies the brakes when he ...
- math - A radio station's signal has a radius of 100 miles. If you drive at a ...
- Science - The rms(root-mean-square) value of a periodic signal s(t) is defined ...
- 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 ...
- Mathematics - A motor car travels 175 km distance from a place A to B,at a ...

More Related Questions