Hearing aid technology is constantly improving, and new products are introduced all the time. To understand what your loved one needs, you first need to know how a hearing aid. A hearing aid consists of three parts: a microphone, amplifier and speakers. The hearing aid receives sound through a microphone that converts sound waves into electrical signals and sends them to an amplifier. The amplifier increases the power of the signals and sends them to the ear through a speaker. The hearing aid can be programmed on a computer to adjust the amplifier to your specific hearing loss. Are you looking for a hearing aid, but do not know where to start? Here is the ultimate guide to the leading brands of hearing aids. I will review some of the names in hearing aids, including Siemens Hearing aids, hearing aids Beltone, Starkey hearing aids and Phonak hearing aids. Hearing aids are available in analog or digital models. Analog hearing aids on the market for years. These are less expensive than digital hearing aids, but do not provide the sound quality and features that make digital hearing aids. Digital hearing aids offer a cleaner sound quality than analog devices and can be programmed by computer to obtain a high level of regulation. Hearing aids have declined as a result,