Take a look at the colorful history of hearing aids, ear trumpets of the first electronic hearing aid (too bulky to be portable) to the invention of transistors into the digital age. You will also learn about some of the latest innovations, including the use of ADRO (adaptive dynamic range optimization) technology into new lines of hearing aids.
The history of hearing aids: A look at the technology of hearing aids
From its size with its way of operating that way, the hearing aid technology that is used today is very different from what hearing aids used 100, 50 or even five years ago. The history of hearing aids is far reaching and colors – the first hearing aids worked without electricity, while the first electric models were simply too big to be portable. Today, digital hearing aids are discrete, lightweight, and have the ability to be adjusted for different environments and to amplify the sound without distortion. And the future has many improvements in hearing aid technology as a whole. But it is important to review the history of hearing aids to understand that only the industry is headed.
The early history of hearing aids
We began our look at the history of hearing aids two hundred years ago, when aid arrived in the form of ear trumpets – large horn in the form of devices used to direct sound into the ear of a hearing impaired person and provide very basic sound amplification without electricity. These trumpets were large and difficult, although some models can be worn on the head with a harness. There is a basic function – sound amplification – and could also improve the signal to noise ratio in a noisy environment, but were unable to do much more. In fact, Cupping his hand behind his ear gives a similar (but smaller) amplification. Hearing aid technology has come a long way from now.
The advent of electric hearing aids
Hearing aid technology began to change rapidly with two important milestones in the history of hearing aids – the advent of electricity and Alexander Graham Bell’s work on the phone, which was essentially an electronic machine that could amplify the sound through a microphone carbon in combination with a battery. Modern technology is still Headset uses the concept of a receiver, a telephone, to describe the small speaker inside the hearing aid.
In the early 1920s, hearing aid technology incorporated the use of vacuum tubes, allowing a much more efficient method to amplify the sound. However, the first electric trợ thính hearing aids are still too unwieldy to be carried around easily – many of them as big as the table radios, and just as heavy. Fortunately, an important event in the history of hearing aids is just around the corner.
Smaller batteries, smaller hearing aids
One of the first major changes in the history of hearing aids that led to a decrease in size was the miniaturization of batteries. Previously, batteries were large, heavy, and could not hold a charge for a long time, which makes them impractical for use by hearing aid. Battery packs must be used in the hearing-impaired person’s body. In the 1930s, hearing aid technology has progressed so that aids could be portable.
The transistor changes everything
However, the most important event in the history of hearing aids had not yet arrived. It is the invention of the transistor in the 1950s that changed hearing aid technology completely. A transistor is simply a switch that has no moving parts and that has only two options: On or Off. Place several transistors together, however, and you can get increasingly larger combinations of on / off switches – the basic binary code, and, essentially, a computer in its simplest form. In addition, the conductivity of a transistor can be manipulated on the basis of the purity of silicon with which the transistor is, providing an infinite number of possibilities for the transistor can be used. Silicon transistors allowed hearing aids to shrink in size so that they can become “body aids,” eventually leading to hearing aid technology available in a size that we are familiar today – with the aid that can be used discreetly behind the ear or even within the ear canal.