Reading...
Play button
Play button
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;
25 Cards in this Set
- Front
- Back
|
ALDs
|
Assistive Listening Devices
|
|
|
ALD may be helpful in:
|
Ambient noise
Reverberation Background noise |
|
|
How does ALD work?
|
It collects sound from the sound source and delivers it to the user's ear
|
|
|
2 types of ALDs
|
Wireless and hardwired
|
|
|
Wireless systems
|
FM system
Infrared system Induction loop system (uses radio waves to transmit sound to the users ear without wires) |
|
|
Hardwired systems
|
connect the sound source to the listener by an actual wire
|
|
|
HAT
|
Hearing assistance technology- facilitates access to auditory information:
|
|
|
Closed-caption decoder for TV
|
closed captions are embedded into TV shows and become visible with the use of the decoder or built in TV decoder. The listener can view what is being said or heard on the TV by typed text at the bottom.
|
|
|
Telecommunication for the Dead (TDD)
|
about the size of a typewriter and allows a person to type the words that they want said over a telephone. Some include paper, others just have a screen and keyboard.
|
|
|
Telephone adapter
|
work with the hearing aid's telephone pickup feature, which is called the telecoil. A portable device slipped over the receiver, the telephone adapter does not amplify sound; it simply generates a magnetic field on which the hearing aid T-switch depends for proper operation.
|
|
|
Telephone amplifier
|
small devices that can be carried and slipped over the receiver of a regular telephone handset to provide increased amplification
|
|
|
TDD Relay message service
|
Operates like a TDD with type to text but uses a 3rd party live operator who speaks the message and types back a response from the listener.
|
|
|
FM (frequency modulation) system
|
use radio signals to transmit amplified sounds, uses a microphone and a receiver. Can be used with or without hearing aids
|
|
|
Telecoil
|
is a coil of wire that is installed inside many hearing aids and cochlear implants to act as a miniature wireless receiver. It was originally designed to make sounds clearer to a listener over the telephone. It also is used with a variety of other assistive listening devices, such as induction loop systems, FM systems, infrared systems, and personal amplifiers.
|
|
|
Neckloop
|
Portable form of the induction loop wire system that is worn around the speakers neck. very convenient.
|
|
|
Where can FM system be used?
|
classroom, church, lectures, theaters, etc.
|
|
|
Personal FM systems
|
operate the same way an typical FM system but used for one-on-one communication.
|
|
|
Vibratory pager
|
vibrates against the user to signal something ex. phone call
|
|
|
Examples of HAT (or signal alerting devices)
|
Vibrating alarm clocks
Flashing alarm clocks Doorbell with flashing lamp Flashing light for smoke detector Flashing light for telephone call Flashing light for baby cry |
|
|
Simple amplification system
|
simply amplifies the audio signal so it is louder for the person with hearing loss
|
|
|
Infrared system
|
broadcasts from the sound source to a receiver by means of infrared light waves. Similar to FM unit.
|
|
|
Induction loop system
|
a loop wire is placed around the circumference of the room, sound is picked up by a microphone or direct input, and converted to electrical signals and sent through the loop. Listener must sit in or beside the loop. Used with hearing aid telecoil.
|
|
|
ALD appropriate situations:
|
one-on-one communication
group conversations TV Radio reception reception of environmental signals |
|
|
Headphones/ ear buds
|
Can be used if a person does not wear a hearing aid or cochlear implant, and used with many ALDs
|
|
|
DAI
|
Direct audio input- hardwired connection that leads directly from the sound to the hearing aid or listening device. Can be used with FM system
|
