posted by .

The modern hearing aid is, essentially, a miniature public-address system, which converts sound into electrical energy and then converts it back to sound again. A hearing aid can increase the sound level by sixty decibels or more, but it also distorts the sound to some extent. Speech sound somewhat tinny, just as it does over the telephone.

According to the passage, what is the disadvantage of the hearing aid?

a. It makes speech sound tinny over the telephone

b. It increases the sound level too much

c. It has to convert sound into electrical energy before converting it back again.

d. It distorts the sound

The only negative in that paragraph is that hearing aids don't convey the real sound.

## Similar Questions

1. ### Physics

The intensity due to a number of indipendent sound sources is the sum of the individual intensities. A) When four quadruplets cry simultaneously, how many decibels greater is the sound intensity level than when a single one cries?
2. ### physics sound

1. A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.50 s later. Find the depth of the well if the air temperature is 10.0°C. 2. Calculate the sound level in decibels of a sound wave that has an …
3. ### Hearing Aids

I`ve looked at a lot of websites regarding how a hearing aid work but none of them told how the sound waves were involved in depth. Like what happens to the sound waves in the microphone, amplifier and speaker. Could someone explain …
4. ### Hearing Aids ; Physics

I`ve looked at a lot of websites regarding how a hearing aid work but none of them told how the sound waves were involved in depth. Like what happens to the sound waves in the microphone, amplifier and speaker. Could someone explain …
5. ### Algebra 2

Can someone help me? I'm really confused. The loudness L of a sound in decibels is given by L= 10log(base10)R, where R is the sound's relative intensity. If the intensity of a certain sound is tripled, by how many decibels does the
6. ### physics

Factory Worker A is exposed to a sound of a constant intensity of 6.30 × 10–4 W m–2 at a distance of 1.00 m from a noisy machine. The frequency of the sound is 4.00 kHz. (a) What is the sound level in decibels (dB) of this sound?
7. ### 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 …
8. ### LOGS

The decibel level of a sound is given by dB=10log(EE0), where E0=10−12wattsm2 and E is the intensity of the sound. (a) Find the intensity of a 80-decibel sound. E= watts per square meter. (b) How many times more intense is the …
9. ### 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 is …
10. ### PHYSICS

When a person wears a hearing aid, the sound intensity level increases by 35 dB. By what factor does the sound intensity increase?

More Similar Questions