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Heart and blood vessel disease, commonly caused by atherosclerosis, leads to blockages in the arteries and poor blood circulation, resulting in various conditions such as heart disease and stroke.

A signal channel is also known as a signal processor. The more channels in a hearing aid, the better and more comfortable the sound quality will be. Especially, Hearing aids may not be effective at reducing noise in noisy environments.

On the other hand, advanced hearing aids with many channels can process sounds of different amplified frequencies (e.g. music, phone calls, car noises, etc.) or reduce the volume in increments to adjust hearing. You definitely get decent sound quality for what you pay for. Hearing aids with many channels are also more expensive.

It is a tympanometry test, and sometimes hospitals will conduct tympanometry tests on the elderly to determine if hearing problems originate from the middle ear. This can benefit the elderly by aiding in the resolution of hearing issues, thus facilitating better communication in daily life. Additionally, for elderly individuals considering the use of hearing aids, they can be assisted in effectively utilizing them.