A person with extreme hearing loss may choose to use a cochlear implant to regain their hearing. Below is an image of a person wearing a cochlear implant. An engineer wants to design a new cochlear implant, but only the four materials shown in table A are available to him. Table A shows the frequency of sound waves that each material can pick up. Table B provides frequency ranges and examples for three different types of sound.Of the four materials that are available to the engineer, which material should he use for the implant design? A. material X B. material Z C. material W D. material Y

While treatment for hearing loss is typically associated with the ears, some patients with damaged ear structures are not able to use traditional cochlear implants. __________ researchers are working to develop hearing aids anchored to patients’ bones in order to combat hearing loss through vibrations in the skull.Which choice completes the text with the most logical transition?*A. Secondly,B. In addition,C. Finally,D. Hence,

What condition can be treated with a cochlear implant?Multiple ChoiceConductive deafnessSensorineural deafnessOtosclerosisTorn tympanic membrane

*What is a hearing aid? *What is a Cochlear implant?*How do hearing aids and Cochlear implants work?  *How does sound travel in aids?  *How does sound travel in Cochlear implants?*How are Cochlear implants similar and different to a hearing aid?*Can a deaf person hear with a Cochlear implant?*What age group that is benefited by both of these?*What is their price range? *how widely they are used?*How have these vhanged over time?

A team of doctors is working to develop a new design for a knee replacement implant. The diagram below shows what a healthy knee looks like.During the knee replacement surgery, cartilage and bone that are causing the patient pain will be replaced with the new knee replacement implant. The knee replacement implant will replace both the top and the bottom parts of the knee joint. The average age of a patient needing knee replacement surgery is about 70 years.Which two criteria should the doctors be considering as they develop their knee replacement implant design? A. The design should break down quickly in the body, and it should lock into place to support the body. B. The design should be strong enough to support the patient's weight, and it should be able to bend. C. The design should chemically react with the surrounding leg bone, and it should be able to bend. D. The design needs to be able to grow as the body grows, and it should lock into place to support the body.

A prosthetic hand can be used to replace a human hand that has suffered an injury or disease that caused the natural hand to no longer function. An engineer is designing a prosthetic hand similar to the one shown below.She wants the design to function as much like a natural hand as possible. In her design, she is including sensors on the fingers and palm that will send information to the brain. This will allow the patient to use the hand to touch a variety of materials in their environment. When selecting materials to use for the outside of the hand design, which constraint should the engineer consider? A. The materials must have a high melting point. B. The materials must be less dense than water. C. The materials must react chemically with oxygen. D. The materials must be magnetic.