A directory of Hearing Aid Specialists in the Manila, Philippines area.
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The smallest of the hearing instruments, these are custom-made to fit deeply inside your ear canal so that they are practically invisible.
These are also custom-made and small enough to fit almost entirely in your ear canal. They can be hardly noticeable.
These are custom-made hearing aids made to fit within the external ear. They are the most widely recommended style.
These fit comfortably behind the ear and are attached to either a custom earmold or special tube and tip that directs sound from the instrument into the ear. BTE models are versatile and can fit a variety of hearing losses.
A type of hearing aid that comprises a rectangular case carried on the body connected by cords to earmolds. A body hearing aid are generally reserved for the most severe hearing losses. It is not often used and is the least common style of hearing aid today.
Brand names commonly available include:
- Siemens
- GN Resound
- Sonic Innovations
- Starkey
- Phonak
- Widex
- Oticon
Hearing Aid History
The hearing Aids ia a device that increases the loudness of sounds in the ear of the wearer. The earliest aid was the ear trumpet, characterized by a large mouth at one end for collecting the sound energy from a large area and a gradually tapering tube to a narrow orifice for insertion in the ear. Modern hearing aids are electronic.
1952
The first commercial device to make use of the transistor was a hearing aid. AT&T certainly helped this along, offering free transistor licenses to hearing aid companies. They did so to honor Alexander Graham Bell, who had devoted himself to helping those who were hard of hearing.
The first hearing aid was put on the market in late 1952 for $229.50 by Sonotone. It used two vacuum tubes and one transistor built by a startup called Germanium Products Corporation. Within days they had competition. The Maico Company offered a version made with three Raytheon transistors. Several months later, Acousticon pulled the price down to $74.50 with a hearing aid powered by a single transistor.
These hearing aids were powered by batteries worn around the waist -- just as the vacuum tube hearing aids were -- but now the cost of replacing those batteries was down to $10 from closer to $100.
Information from www.pbs.org
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