An audiologist is interested in the efficacy of three different types of hearing aids. He gathers three groups of hearing-impaired clients:

One group receives analog hearing aids, which convert sound waves into amplified electrical signals.

The second group receives digital hearing aids, which use directional microphones to control the flow of sound and convert the sound waves into numerical codes before amplifying them.

The third group receives cochlear implants. The results come in, and a statistician conducts an analysis of variance.

Required:

In this study what is the hearing aid type considered and What are the treatments (analog hearing aids, digital hearing aids, and cochlear implants) considered?

Step-by-step explanation:

In the study, the following hearing aid types were considered:

1. The analog hearing aids

2. The digital hearing aids

3. Cochlear implants

The first two types do not require surgery while the last requires surgery.

The treatment considered are

1. Treatment of the first group of hearing impaired clients with analog hearing aids, which convert sound waves into amplified electrical signals.

2. Treatment of the second group of hearing impaired clients with digital hearing aids, which use directional microphones to control the flow of sound and convert the sound waves into numerical codes before amplifying them.

3. Treatment of the third group of hearing impaired clients with cochlear implants