A 60 year old person has a threshold of hearing of 81.0 dB for a sound with frequency f=10,000 Hz. By what factor must the intensity 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.

Thanks for any and all help!

1. 0
2. 0
3. 18
1. Hmmm. 81 - 43 is 38 db.

intentity = antilog (db level/10)
= antilog 3.8= 10^3.8

that is almost 7000 times.

1. 0
2. 0
posted by bobpursley
2. Thank You so much Bob Pursley!!

1. 0
2. 0
posted by Emily

Similar Questions

1. physics

I have a few questions that i am not too sure how to figure out... 1- as a racing car zooms by you, its pitch decreases by 20%. If the speed of sound is 345m/s, how fast is the car travelling? 2-a person has a threshold of hearing

asked by kate on May 17, 2009
2. Physics

Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of hearing) for a period of 9.0 hours. One particular eardrum has an area of 1.90 10-4 m2. How much sound energy is

asked by Morgn on September 14, 2012
3. Physics

The ability to hear a “pin drop” is the sign of sensitive hearing. Suppose a 0.55-g pin is dropped from a height of 28 cm, and that the pin emits sound for 1.5s when it lands. Assuming all of the mechanical energy of the pin

asked by Cameron Arnold on March 9, 2016

NEED HELP ASAP PLEASE!! A high sound level of 120 dB is regarded as the threshold of pain for the average listener. If the threshold of hearing is 10^−12 watts/m^2, then the intensity of the sound corresponding to 120 dB is

asked by jh on March 7, 2010
5. Precalculus

I have posted this question earlier as well but was unable to receive an answer. I don't know how to do this question at all, so PLEASE help me with this question and also show me the steps, so that I can learn. I would appreciate

asked by jh on March 9, 2010
6. physics

Sound is passing perpendicularly through an open window whose dimensions are 1.1 m  0.75 m. The sound intensity level is 95 dB above the threshold of hearing. How much sound energy comes through the window in one hour?

asked by not sure on January 13, 2013
7. physics

Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. The sound intensity level is 71 dB above the threshold of human hearing. How much sound energy comes through the window in one hour?

asked by Anonymous on December 5, 2014
8. Physics

I'm not sure how to calculate this question help me! (Grade 11 Physics) it's sound intensity... Show me how to do it please! (textbook says answer is 3.5 m) At close proximity, rustling leaves have a sound intensity of about 1.2 x

asked by Chris on November 26, 2009
9. physics

a rock group is playing in a club. Sound emerging outodoors from an open door spreads uniformly in all directions. If the decibel level is 70 dB at a distance of 1.0m from the door, at whiat distance is the music just barely

asked by Teah on April 11, 2010
10. Physics

1.The mass of a string is , and it is stretched so that the tension in it is 180 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string? 2.A rocket

asked by Jena on December 7, 2006

More Similar Questions