Maintence, Modification And Repair Flashcards
What are some complaints from Pt’s whom may experience low voltage or battery issues
Not enough gain Output lower than normal Distortion, scratchy, hollow, muffled Buzzing, motorboating, dead Intermittent, noisy Works than dies, and then works again hours later
How should you clean battery contacts
With a pencil eraser or a flat side of a toothpick
How do you check the receiver and microphone
Turn HA on the telephone coil with volume low- receiver ok if it amplifies
If you do not hear your voice amplify what is the problem
The microphone
How do you check the noise suppressor switch
Without changing the volume, the volume decreased when the switch is in active suppression BC the low Frequencies reduce
How can you detect wiring issues
Turn on HA and twist, tap and squeeze the case, a short circuit, loose wire or poor solder connection shows up as intermittent feedback, the weakest link is the microphone wiring
How do you detect an ear boo or coupler issue
Turn on HA and turn down volume and turn HA to Telecoil, if you hear a click ear hook is working properly
How do you run a measurement or listening check
HA Analyzer at either the user level or ANSI standards for HA’s- ANSI Standards will tell you if the HA is within specifications- The analyzer will indicate if a change in acoustic output occurs
When a HA sounds weak, hallow, distorted or intermittent the first check is
A weak battery
An otoscope helps when cleaning the
Receiver
When a HA is dead, you can check receiver and microphone function by
Turning the instrument to telecoil
A HA that works with the battery door slightly open but shuts off when you close the door has
Wires touching the battery
You cannot use feedback checks when
Checking the telephone coil
An earhook damper is puffed when during a feedback check
The instrument feeds back only when the coupler is removed
A sign of a dirty volume control is
Intermittent static
