1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yuki888 [10]
2 years ago
8

A 60 year old person has a threshold of hearing of 95.0 dB for a sound with frequency f=10,000 Hz. By what factor must the inten

sity of a sound wave of that frequency, audible to a typical young adult, (sound level=43.0 dB) be increased so that it is heard by the older person.
If you know the sound level in dB, then you can compute the sound intensity and take the ratio.


Helpful Hint*
In the problem, they gave the intensity as decibels but want to know by what factor to increase the intensity (I) for the young person to get a sound that the older person can hear.

Ignore f completely.

Decibels (dB) need to be converted to I using this equation:
I=(10^(dB/10))*10^-12
Do this for each dB and divide the older person's dB by the younger's.
Physics
1 answer:
Nadusha1986 [10]2 years ago
4 0

Answer:

The intensity increased by a factor of 158489

Explanation:

Given that,

Sound level = 95.0 dB

Sound level = 43.0 dB

Frequency = 10000 Hz

We need to calculate the ratio of sound intensity

Using formula of sound level

sound\ level =10 log\dfrac{I}{I_{0}}

Put the value into the formula

95.0=10\ log\dfrac{I_{1}}{I_{0}}...(I)

43.0=10\ log\dfrac{I_{2}}{I_{0}}.....(II)

Subtracting these equations

52.0=10\ log\dfrac{I_{1}}{I_{2}}

\log\dfrac{I_{1}}{I_{2}}=5.2

Taking inverse log

\dfrac{I_{1}}{I_{2}}=10^{5.2}

\dfrac{I_{1}}{I_{2}}=158489

Hence, The intensity increased by a factor of 158489

You might be interested in
An airplane changes its velocity uniformly from 150 m/s to 60 m/s in 15 s. Calculate:
Arlecino [84]

Answer:2.5

Explanation:

7 0
2 years ago
Find the center of the galaxy with Shapley method
Natalija [7]

Answer:

Calculating Center

Shapley correctly determined the galactic center of the Milky Way to be located in the constellation of Sagittarius. He did this by mapping out a three-dimensional distribution of the globular clusters.

Explanation:

Mark me the Brainliest..PLS

5 0
2 years ago
The sun is directly overhead at the equator on what day of the year
Phoenix [80]
Both equinoxes ... September 21 and March 21.
7 0
3 years ago
Read 2 more answers
Could someone please help me with this problem? I’m thinking that they both will have the same force because they have the same
Simora [160]
You would be correct
7 0
3 years ago
Which of the following describes an accelerated motion
Naily [24]
Accelerated motion such as a vehicle (car) or a moving item such as a (football thrown in the air)
3 0
3 years ago
Other questions:
  • Lizette works in her school’s vegetable garden. Every Tuesday, she pulls weeds for 15 minutes. Weeding seems like a never-ending
    15·2 answers
  • 0.2000 kg of water at 20.00°C is contained in a 0.1000-kg copper container. The container is shaken vigorously for 10.00 minutes
    5·1 answer
  • 1. Distinguish between the relationship that
    12·1 answer
  • A stone is thrown horizontally at a velocity of 12.38 m/s from a tree house that is
    9·1 answer
  • Does a thicker core make the electromagnet stronger?
    8·2 answers
  • What purpose does a generator serve in a power plant?
    15·1 answer
  • Whichiscorrect?(A)anopaqueobjectdoesnotallowlighttopassthroughit.(B)an
    7·2 answers
  • What two things does light provide?
    9·1 answer
  • List the rock layers from oldest to youngest
    8·2 answers
  • Two forces,one of 12 N and another of 24 N,act on a body in such a way that they make an angle of 90degree with each other.Find
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!