A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 24.2 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 3.50 ✕ 10−11 W/m2. What is the intensity delivered to the eardrum?
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies...
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.7 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 2.70 x 101 W/m2. What is the intensity delivered to the eardrum? W/m2
Two trains on separate tracks move toward each other. Train 1 has a speed of 113 km/h; train 2, a speed of 59.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? Hz A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.7 dB. The hearing aid picks up sound having a frequency of 250 Hz...
Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human hearing) for a period of 9.00 hours. An eardrum has an area of 3.42 x 10-4 m2. How much sound energy is incident on the eardrum during this time?
Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human hearing) for a period of 9.00 hours. An eardrum has an area of 3.73 x 10-4 m2. How much sound energy is incident on the eardrum during this time? Number Units
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.
Sound waves at ultrasonic frequencies attenuate much faster than audible sound waves. The sound intensity level of a point source of ultrasonic sound waves is measured as 100 dB at a distance of 1.00 m from the source and 65 dB at 2.00 m. Assuming the waves spread in all directions, what is the attenuation coefficient alpha? [Answer in 1/m to within 5%]
Sound waves at ultrasonic frequencies attenuate much faster than audible sound waves. The sound intensity level of a point source of ultrasonic sound waves is measured as 100 dB at a distance of 1.00 m from the source and 65 dB at 2.00 m. Assuming the waves spread in all directions, what is the attenuation coefficient alpha? [Answer in 1/m to within 5%]
Say Joe Smith has a hearing loss of 27 dB HL at the frequency 1000 Hz; that is, to hear a sound Joe needs 27 dB more than the average person. The average person can just barely hear a sound intensity of 1.74×10-12 W/m2 (at 1000 Hz). What is the faintest intensity that Joe can detect (at 1000 Hz)?
A person standing a certain distance from ten identical loudspeakers is hearing a sound level intensity of 123 dB. What sound level intensity would this person hear if four are turned off?
Using a frequency-measuring lab device, I am to map out the sound intensity level distribution (dB) in a room (both with & without music playing) to create a 5x5 grid of 25 data points. Using the following data table of sound intensity level β(dB) and corresponding intensity I(W/m2), I also need to find the intensity to the nearest order of magnitude for the points on my sound intensity level maps. Here is the data table: Intensity levelβ(dB) Intensity I(W/m2) Example/effect...