Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
Three Components of Hearing Aides |
Microphone, Amplifier and Receiver |
|
Microphone |
Sound --> Electrical energy (Capture sound from environment). |
|
Amplifier |
Louder signal |
|
Receiver |
Signal ---> sound energy (Sends amplified signal to ear) like a speaker. |
|
Six Components of the CI System |
External Microphone, Speech Processor, Cord External Transmitter, Internal Receiver and Electrode Array. |
|
External Microphone |
Picks up sounds and speech in the environment. |
|
Speech Processor |
Digitizes and processes the acoustic signal |
|
Cord |
Sends the digitized sound to the external transmitter. |
|
External Transmitter |
The signal is sent across the skin from the external transmitter to the internal receiver. |
|
Internal Receiver |
The Internal receiver stimulates the electrode array |
|
Mapping |
Program in the speech processor that stimulates the electrodes in the individual's cochlea. When appropriately mapped, a cochlear implant recipient's aided thresholds should fall between 20-35 dBHL. |
|
What does a Map consist of? |
Threshold level (lowest level of stimulation that will generate a response) and comfort level (the highest level of stimulation that is comfortably loud). |
|
What is ALD? |
Assistive Listening Device |
|
Benefits of ALDs |
Acoustic advantage, distance from speaker to listener is not an issue, mobility, and can be used with or without personal hearing aides. |
|
Four types of ALDs |
Personal, Sound-field, Infrared, and Induction Loop System |
|
Personal FM |
Wireless, portable, speaker wears microphone connected to body worn transmitter. |
|
Personal FM Advantages/Disadvantages |
Advantages: Portable, flexible, use indoor or outdoor, appropriate for mild to profound HL, good signal strength. Disadvantages: Receivers are required for everyone, receivers vary in quality, potential for outside interference. |
|
Sound-field FM Systems |
Similar to personal FM, amplification comes from loudspeaker, system has microphone/fm transmitter, speakers |
|
Infrared Systems |
Uses infrared light, transmitter emitter panel like a diode on a remote |
|
Infrared System Advantages/Disadvantages |
Advantages: Compatible, can be used in adjacent rooms, best quality, good for mild to moderate severe HL, not affected by radio transmission. Disadvantages: Everyone needs a receiver, requires direct line of sight, indoor or evening use only, large area require multiple emitter panels, quality varies |
|
Induction Loops Systems |
Transmits electromagnetic waves, hearing aid telecoil or desktop unit receives signal, loop encircles the room or localized to a specific area like a chair or around neck. |
|
Loop System Advantages/Disadvantages |
Advantages: Low equipment costs, easy operation, lasts forever, induction receiver is universally compatible, works with T-coil hearing aide. Disadvantages: Interference from wiring and florescent lighting, spillover outside of loop area, strength can vary, room size restrictions |
|
What are some listening environment strategies to help with acoustic hearing?
|
Rearrange furniture for conversation, change lighting to see faces, decrease the noise and reverberation, and decrease distance from speaker. |