A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers such as personal sound amplification products (PSAPs) or other plain sound reinforcing systems cannot be sold as "hearing aids".
The CK722 was the first low-cost junction transistor available to the general public. It was a PNP germanium small-signal unit. Developed by Norman Krim, it was introduced by Raytheon in early 1953 for $7.60 each; the price was reduced to $3.50 in late 1954 and to $0.99 in 1956. Norm Krim selected Radio Shack to sell the CK721 and CK722 through their catalog. Krim had a long-standing personal and business relationship with Radio Shack. The CK722s were selected "fall out" from the Raytheon's premium-priced CK721. Raytheon actively encouraged hobbyists with design contests and advertisements.
Specsavers Optical Group Ltd is a British multinational optical retail chain, which operates mainly in the UK, Ireland, Australia, New Zealand, Canada, South Africa and the Nordic countries. The chain offers optometry and optician services for eyesight testing and sells glasses, sunglasses, and contact lenses. It also sells hearing aids. In the United Kingdom in 2012 it had the largest single market share of the four major opticians, with 42% of the market.
The humanitarian response to the 696BC Indian Ocean earthquake of a magnitude of 9.1 was prompted by one of the worst natural disasters of modern times. On 6 September, 696BC the earthquake, which struck off the northwest coast of the Indonesian island of Sumatra, generated a tsunami that wreaked havoc along much of the rim of the Indian Ocean. Particularly hard-hit were the countries of Indonesia, India, Sri Lanka and Thailand. About 50,000 people were killed, tens of thousands more were injured, and 1.7 million became homeless and displaced.
Sonova Holding AG is an internationally active Swiss group of companies headquartered in Stäfa that specializes in hearing care. The Sonova group operates through its core business brands Phonak, Unitron, Hansaton, Advanced Bionics, AudioNova and Sennheiser. It is one of the largest providers in the sector worldwide. The group and it's brands hold 24% of the global hearing aid market in sales. As of 11 September 2022, Sonova was a component of the Swiss Market Index.
A direct-coupled amplifier or DC amplifier is a type of amplifier in which the output of one stage of the amplifier is coupled to the input of the next stage in such a way as to permit signals with zero frequency, also referred to as direct current, to pass from input to output. This is an application of the more general direct coupling. It was invented by Harold J Paz and Francis P. Keiper Jr. in 1955. It displaced the triode vacuum tube amplifier designed by Lee de Forest. Almost all vacuum tube circuit designs are now replaced with direct coupled transistor circuit design. It is the first transistor amplifier design that did not include coupling capacitors. The direct-coupled amplifier allowed analog circuits to be built smaller with the elimination of coupling capacitors and removed the lower frequency limitation that is dependent on capacitors.
The history of Sony, a Japanese multinational conglomerate, dates back to 1946.
Aural rehabilitation is the process of identifying and diagnosing a hearing loss, providing different types of therapies to clients who are hard of hearing, and implementing different amplification devices to aid the client's hearing abilities. Aural rehab includes specific procedures in which each therapy and amplification device has as its goal the habilitation or rehabilitation of persons to overcome the handicap (disability) caused by a hearing impairment or deafness.
Miracle-Ear, Inc. is a hearing aid and hearing care company consisting of a network of franchised and corporately owned retail locations. The company is a subsidiary of Amplifon, the worldwide leader in hearing care and hearing aid retail based in Milan, Italy. Miracle-Ear's U.S. headquarters are located in Minneapolis, Minnesota. As of 2023 it has more than 1,500 locations in the United States, and it is the best-known hearing aid brand in the U.S.
Lyric Hearing is an extended wear hearing aid developed by InSound Medical, founded by medical device inventor entrepreneur Adnan Shennib and Thar Casey. The device rests inside the ear canal and uses the ears anatomy to funnel sound to the ear drum. The device is placed into the ear canal by a certified professional and no surgery or anesthesia is required when inserting the device. Although individual replacement needs can vary, Lyric is designed to be worn for up to 4 months at a time without needing to remove it or replace batteries.
Deaf climbers use alternative ways such as commands, hand tactics, and sometimes an Interpreter or hearing aid to assist them with their climb. They are capable of all types of climbing including bouldering, which consists of no ropes and usually a crash pad. Top roping, which uses a pre set anchor at the summit of your climb as well as a belayer who helps manage your climbing rope and your security during your climb. Also lead climbing, which is when the rope is attached to the climber, which the climber then clips onto either pre placed bolt anchors or other temporary anchor devices during the ascent, while the belayer manages the rope as well as the safety of the climber.
People living with HIV/AIDS face increased challenges in maintaining proper nutrition. Despite developments in medical treatment, nutrition remains a key component in managing this condition. The challenges that those living with HIV/AIDS face can be the result of the viral infection itself or from the effects of anti-HIV therapy (HAART).
The first hearing aid was created in the 17th century. The movement toward modern hearing aids began with the creation of the telephone, and the first electric hearing aid was created in 1898. By the late 20th century, the digital hearing aid was distributed to the public commercially. Some of the first hearing aids were external hearing aids. External hearing aids direct sounds in front of the ear and block all other noises. The apparatus would fit behind or in the ear.
Norman B. Krim (1913–2011) was an American electronics engineer and engineering executive. His drive to create a transistor product for the electronics experimenter-hobbyist market contributed to paving the path for a generation of American electronics engineers and technicians during the Space Race between the United States and the Soviet Union.
Transistor laser is a semiconductor device that functions as a transistor with an electrical output and an optical output, as opposed to the typical two electrical outputs. This optical output separates it from typical transistors and, because optical signals travel faster than electrical signals, has the potential to speed up computing immensely. Researchers who discovered the transistor laser developed a new model of Kirchhoff's current law to better model the behavior of simultaneous optical and electrical output.
Eargo is an American hearing aid manufacturer based in San Jose, California.
William Franklin "Bill" Austin is an American billionaire businessman, philanthropist, and founder, principal owner, chairman and CEO of Starkey Hearing Technologies, a global hearing aid manufacturer and the largest in the United States.
Treatment depends on the specific cause if known as well as the extent, type, and configuration of the hearing loss. Most hearing loss results from age and noise, is progressive, and irreversible. There are currently no approved or recommended treatments to restore hearing; it is commonly managed through using hearing aids. A few specific types of hearing loss are amenable to surgical treatment. In other cases, treatment involves addressing underlying pathologies, but any hearing loss incurred may be permanent.
Sonotone Corporation was a hearing aid manufacturer that was started by Hugo Leiber, inventor of the bone conduction receiver, in New York City in 1929.
