Recently in a local hearing clinic, a client’s concerns were discussed. “I’m afraid I won’t like them. My brother in law bought two hearing aids, and he keeps them in a drawer in the kitchen.” While the number of people dissatisfied with their hearing aids hovers around 50%, the hearing aid industry is hard pressed to decrease the number of returns, and increase the average daily use of each aid. In order to accomplish this, hearing aid manufacturers must answer the most often heard complaint: “It doesn’t work well in noise.”
Unfortunately, a hearing aid will never be able to accomplish the sifting and sorting that is carried out in the human brain. While a person with normal hearing sits in a restaurant, he can distinguish a conversational speech signal that is as little as three decibels greater than the ambient noise. On the other hand, a person with a 30-decibel sensorineural loss might need the speech signal to be 15 or more decibels greater than the ambient noise. The hearing aid’s task is to acoustically or electronically compensate for both the neurological shortcomings of the hearing impaired person and the wide band increase inherent in any basic amplifier.
Acoustic compensation can be carried out in a hearing aid microphone. Most hearing aids today utilize omnidirectional microphones, which pick up sound equally from all directions. This may be beneficial and practical in some cases, as in the completely in the canal (CIC) aid. The CIC aid uses the natural funneling of the auricle in order to focus sound directly into the instrument. Behind-the-ear (BTE) and full concha in-the-ear (ITE) aids lose this anatomical feature, and may benefit from a directional microphone. “The purpose of using a directional microphone is to focus its sensitivity toward the front of the listener, thereby attenuating or reducing unwanted “noise” or competition emanating from behind the listener.” (Stach 1998)
Microphone directionality can be accomplished by using a single microphone with two sound inlets. In this mechanical method, the time lag created by a sound entering each inlet is precisely calibrated to cancel out sounds from the sides and back of the microphone as they strike the diaphragm. The Phonak MicroZoom uses an electronic approach. Each MicroZoom contains two omnidirectional microphones. According to the flyer, “One picks up sound in front of you while a second picks up sound from the sides and rear.
Technology nowadays is getting more and more dangerous, especially to our ears. Every day we are subjected to videos, text sounds, alert sounds, alarms, and anything else that may be of use in life. These sounds seem to be happening more often which is damaging our ears. There is a solution to this damage though, and that is cochlear implants. These implants will bypass the damaged part of your ear to give you a sense of sound that can be made very useful to the patient. This paper will look into how the ear works, how hearing loss happens, why these cochlear implants are a good solution, how these implants work, cost and ethics related to these implants, and what the future holds for them.
There are many everyday devises that we hearing people take for granted, among these are telephones, smoke alarms, doorbells, and alarm clocks. When we look at how members of the deaf community use these everyday items we must consider that members within the community have very different communication needs, abilities, and preferences. Hard-of-hearing people for example can use a standard telephone with the addition of a headset or amplifier, while some hard-of-hearing people may prefer a TTY deaf persons rely on it, or a relay service to communicate as we (hearing people) would on a telephone.
Lane, Harlan (1992). “Cochlear Implants are Wrong for Young Deaf Children.” Viewpoints on Deafness. Ed. Mervin D. Garretson. National Association of the Deaf, Silver Spring, MD. 89-92.
Cochlear implants are electronic devices that sends signals directly to the auditory nerve. Cochlear implants consist of external parts which include the microphone, speech processor, and the transmitter. They also consist of internal parts that must be surgically placed under the skin including the receiver and electrical array. In order for the implant to work, the microphone
Cochlear Implants only restore very limited audibility. When described by formerly hearing Deaf people they compare it to hearing underwater, “fuzzy and timbre” yet still able to discern some
Specific Purpose: To help people to understand what Audism is and that the lack of an ability to hear does not mean they are incapable of performing tasks.
In the middle ear the sound is amplified in order to move the fluid in the ear.
TTYs (also called Telecommunication Devices for the Deaf (TDD) and text telephones) are used for two-way text conversation over a telephone line. They are the primary tool used by deaf people (and some hard of hearing people) for telephone conversation. Other visual telecommunications technologies and services, such as Internet chat and messaging, email, e-paging, and fax and e-mail are also used in telecommunications by people who are deaf or hard of hearing.
National Institute on Deafness and Other Communication Disorders. (November 2002). Retrieved October 17, 2004, from http://www.nidcd.nih.gov/health/hearing/coch.asp
Lorenzi, C., Gatehouse, S., & Lever, C. (1999). Sound localization in noise in hearing impaired listeners. Journal of the Acoustical Society of America, 105 (6), 3454-3463.
In my life, I've had a major setback that has changed how I live life day to day. When I was five, I was diagnosed with permanent hearing loss. I have hearing loss in both ears, mostly in higher frequencies, but I still have some hearing loss in the lower ones too. Since I was 5, it has only gotten worse, just in the past year there has been drastic changes in the frequencies that I can't hear. Hearing loss affects me day to day, for example if anyone whispers something to me, nine of ten times I can't hear what they are saying. My academics also get affected because sometimes I can't hear what we have for homework over all of the background noise of people packing up, so sometimes I just don't do homework because I never heard it in the first place. Not doing homework because I can't hear it affects my grades as I will get zeros for not doing it.
National Institute of Health. (2011). National Institute on Deafness and other communication disorders: Improving the lives of people who have communication disorders. National Institute on
Hearing loss is often overlooked because our hearing is an invisible sense that is always expected to be in action. Yet, there are people everywhere that suffer from the effects of hearing loss. It is important to study and understand all aspects of the many different types and reasons for hearing loss. The loss of this particular sense can be socially debilitating. It can affect the communication skills of the person, not only in receiving information, but also in giving the correct response. This paper focuses primarily on hearing loss in the elderly. One thing that affects older individuals' communication is the difficulty they often experience when recognizing time compressed speech. Time compressed speech involves fast and unclear conversational speech. Many older listeners can detect the sound of the speech being spoken, but it is still unclear (Pichora-Fuller, 2000). In order to help with diagnosis and rehabilitation, we need to understand why speech is unclear even when it is audible. The answer to that question would also help in the development of hearing aids and other communication devices. Also, as we come to understand the reasoning behind this question and as we become more knowledgeable about what older adults can and cannot hear, we can better accommodate them in our day to day interactions.
One such device is the hearing aid. According to the Kendall School Support Services Team (2003), deaf children who wear hearing aids may have increased ability to differentiate between different sounds. They can also better monitor their own voices, making it easier for them to build speech skills. Enhanced ability to understand conversation is another benefit. However, hearing aids do not make sounds clear, nor do they make hearing perfect. Further, the student must sit near the speaker, as extraneous noise makes listening an even greater challenge (Kendall School Support Services Team, 2003).
Environmental modifications serve as one type of intervention for APD (Bellis, 2003). These modifications are “intended to improve the individual’s access to auditory information by enhancing the clarity of the acoustic signal and facilitating listening and learning in the academic, home, work, or social environment” (ASHA, 2005a). Examples of environmental modifications include preferential seating, use of visual aids, use of assistive listening systems, architectural intervention to “reduce reverberation and improve the signal-to-noise ratio” (ASHA, 2005a).