What Is the Intensity of Sound at 123 dB?

  • Thread starter Thread starter yoshiba
  • Start date Start date
  • Tags Tags
    Logarithms
AI Thread Summary
The intensity of sound at 123 dB can be calculated using the formula L = 10 * log(P1/P0), where P1 is the sound power and P0 is the reference power level. The user attempts to derive the intensity by manipulating logarithmic equations, aiming to express the relationship between sound levels. The intensity at 123 dB is significantly higher than that of a whisper at 20 dB, which is much quieter and has a lower intensity value. The discussion focuses on understanding the logarithmic relationship in sound intensity levels. Clarification on the calculations and logarithmic properties is sought for accurate results.
yoshiba
Messages
7
Reaction score
0
Logarithms and Intensity---HELP ASAP!

Homework Statement


a)What is the intensity of sound at 123 dB?

b)Compare it to that of a whisper at 20 dB.



Homework Equations



something with logarithms??



The Attempt at a Solution



a) 10^123
 
Physics news on Phys.org
Inensity is equivalent to power and so the ratio of power is
L = 10* log * (P1/P0)

Where Log is the base 10 log ( labbled Log on your calculator)
 
so for a) I would do:
123=10*log*(P1/P0)
10^123=(P1/P0)^10
(10^123)^(1/10)=(P1/P0)

is that correct?
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Correct statement about a reservoir with an outlet pipe'

Thread 'Correct statement about a reservoir with an outlet pipe'

The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
View full post »

Similar threads

Sound intensity of a thunderbolt
Replies
1
Views
1K
Waves: Calculate the sound intensity from two speakers
Replies
3
Views
3K
Sound Intensity: Reduce by 35 dB, Factor Calculation
Replies
4
Views
6K
Calculating τ by knowing I is proportional to A^2
Replies
8
Views
2K
Calculating the power output from a persons mouth
Replies
3
Views
2K
Sound Intensity (Level) - Hearing Aid
Replies
5
Views
2K
B Sound Intensity doubles if number of noise sources double?
Replies
7
Views
1K
How Does Distance and Quantity Affect Sound Intensity?
Replies
1
Views
3K
Calculating Sound Intensity and Pressure Variation at a Distance
Replies
4
Views
2K
"Sound Intensity Decreases with Distance
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top