9.2 Flashcards
What is cap 562 leaflet h-60
You must wear glasses or contacts to correct vision problems
What are the three areas of the ear
Outer ear
Middle ear
Inner ear
What is the structure of an ear
Hammer
Anvil
Stirrup
These all tranfer vibration from outter ear to inner eye
There is also hear like memberains
What are the hair like membainsa in a ear for
Converting vibration to electrical signals
What is the eustachan choob
It is connected to nose and mouth. Flem can block this tube
It is used for balance and detecting acceleration
Located in the inner eye.
What are the Ossicles
They are mussels that protect there ear for loud noise by moving
What is the human hearing range
Average human can hear from 20hz to 20khz
What sound level should you wear hearing protection at
90db.
What are the factors effexting poformance by noise
Being annoying
Interfering with verbal communication
Cause accidents
What are the different distances in a normal conversation.
If you can have a normal conversation at 2 meters apart. It is 80 to 85db. Assessment has to be made
If you can hear at 1 meter the may be damge being done to your hearing.
An employer must provide hearing protection
If it is above stop work until a solution if provided
What is noise dose
Conbnation of noise intensity and duration
Any noise over 80db it contributes to noise does
More the 115 db with out ear protection is not permitted to be there for any time.
90 db need are protection
Different hear protects
Up to 20db you can use a ear plug
Above 40db ear defenders are needed
130 is to high for any ear protection
What does NIHL stand for
Noise induced hearing loss.
Can be temporary
Can cause permanent damge to the hair like membrane
What is the term for hearing loss due to age
Prebycusis.
From about 30 years
Gradual
What are the tree process of brain
Encoding
Storage
Retrieval
What is iconic memory
Where the visual are stord
What is echoic memory
Sounds
What is perception
The process of assembling sensations into a usable mental representation of the world
2d of 3d
2d in the retina and 3d is down to your perception
What is the cocktail effect or selective hearing.
Giving greater attention to one or more source that you deemed to be more important.
Like when someone says your name at a party
Divided attention
Doing more the one thing at a time. However somethings will not be run as safely
What is focused attention
Focusing on single actions ignoring what’s going on around you
What is sustained
Remain attentive or a long time. Needs less stress.
What is sensery memory
Ultra short term. Last 2 seconds
Gose to iconic for 2 secs
Goes to ecoic for 0.5 seconds
What is short term memory
Referd to as working memory
5 to 9 items that last for upto 20 seconds
What is long term memory
Long term is unlimited duration and amount
Never lost. Like language
Episodic events
Semantic- facts
Motor programs
What are motor programs
Routinez that run together
Happen without thinking
Make the second nature
What is the cochlea
Converts vibration to electricity
