Final answer:
The term for a device that aids individuals who are Hard of Hearing by making audio more accessible is an Assistive Listening Device. This can include a variety of technologies like FM systems or induction loops. Capacitors in series can be used with hearing aid speakers to adjust for presbycusis, and cochlear implants can assist those with a nonfunctional cochlea.
Step-by-step explanation:
The term that refers to any device or system designed to make speech or audio more accessible to the Hard of Hearing is Assistive Listening Device (ALD). These devices can range from personal amplifiers to systems that work in conjunction with hearing aids or cochlear implants. An ALD can include technology like infrared systems, FM systems, or induction loop systems to deliver sound more clearly and directly to the user, thereby improving the clarity of speech and other sounds. Regarding presbycusis, a condition where higher frequencies are lost due to age, using a capacitor in series with the speaker of a hearing aid could help adjust the output for this condition by effectively reducing the amplification of these higher frequencies. In terms of treatment for different types of hearing loss, hearing aids are typically effective in treating sensorineural and conductive hearing loss, while cochlear implants can restore hearing in individuals with a nonfunctional cochlea but are not suitable for all types of hearing loss.