Physics - Please Help

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. 👍
  2. 👎
  3. 👁
  1. Hmmm. 81 - 43 is 38 db.

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

    that is almost 7000 times.

    1. 👍
    2. 👎
  2. Thank You so much Bob Pursley!!

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science--HELP!!

    1. In which of the following situations is a sound wave most likely to travel through air? A) An alarm clock rings in a vacuum. B) A giant star explodes. C) A grasshopper eats a leaf. D) An astronaut uses tools in space. 2. Which

  2. Law

    Simone is a 15 year old and a repeat offender. She has been arrested again. In what order will her proceedings occur? A. Intake, Referral, Dispositional Hearing, Adjudication, Aftercare. B. Adjudication, Intake, Dispositional

  3. Physics

    The range of human hearing extends from approximately 20 Hz to 20000 Hz. Find the wavelength of these extremes when the speed of sound in air is equal to 343 m/s.

  4. algebra

    The loudness, L L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d d, from the source of the sound. Round to 3 decimal places. A person 15 feet from a jetski, it is 75 decibels

  1. Physics

    At a busy street corner, the sound level is 75dB. What is the intensity of sound there? (Take threshold of hearing Io=1.0×10^-12W/m²?

  2. Science

    A blind person walks the neighborhood making loud clicking noises with his tongue. He doesn't use a walking stick nor does he have a seeing-eye-dog. However, he avoids every obstacle and is able to navigate his way around the

  3. Statistics

    Sulfur compounds cause "off-odors" in wine, so winemaker want to know the odor threshold, the lowest concentration of a compound that the human nose can detect. The odor threshold for dimethyl sulfide (DMS) in trained wine tasters

  4. Physics waves- check answer please

    I would like to know if my answer is correct. Thanks in advanced! A person with their head sideways in the water sees a beaver slap its tail on the lake surface 1.2 km away. What is the time difference between the sound heard in

  1. physics

    An audio speaker at a concert emits sound uniformly in all directions at a rate of 100 W. (i) Calculate the sound intensity experienced by a listener at a distance of 8 m from the speaker. The listener moves back from the speaker

  2. 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

  3. Physics

    Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person. The frequency of one of the ultrasonic waves is 84 kHz. (The range of hearing for a healthy young

  4. physics

    If the intensity of a person’s voice is 3.6×10−7 W/m2 at a distance of 2.1 m, how much sound power does that person generate? Answer in units of W

You can view more similar questions or ask a new question.