The frequency of a sound determines its ___.
The amplitude of a sound determines its ___.
What is the range of frequencies a human can hear?
20 - 20000 Hz
The external ear is shaped to receive what?
The internal ear chamber is full of (fluid / air).
The middle ear does what to sound?
The inner ear converts sound energy to what?
Which structure receives sound and converts it to nerve impulses?
By which nerve do nerve impulses travel from the cochlea to the brain?
Which part of the brain receives nerve impulses from the vestibulocochlear nerve?
Where exactly in the brain is this part found?
Which specific part of the brain processes info from the ear?
Primary auditory cortex
At which point can a foetus hear?
At which point can a foetus respond to noise?
At birth, some infants will have what?
of varying severity
What proportion of infants will have bilateral hearing loss at birth?
1 : 1000
At what age do babies start making noise?
At what age do children start babbling?
Between 12 and 24 months, how do children learn to speak?
Focus on syllables and delete the rest
Cut syllables which are too hard
Substitute hard sounds with easier ones
Use single words to describe things
At which age do children start to talk?
At which age are children more capable of talking by using two word phrases and using more words?
What are some causes of developmental delay in language skills?
Autism spectrum disorders
Specific language disorders (e.g verbal dyspraxia)
Global developmental delay e.g Down syndrome
What is a SALT?
Speech and language assessment
What proportion of babies are born with profound hearing loss?
1 : 1000
How can profound hearing loss be caused in the womb?
Acquired - maternal infection, trauma
How is hearing loss detected in newborns?
Which type of cells are missing from the cochlea in children who may have profound hearing loss?
Outer hair cells
What is used to allow children with hearing loss to pick up sound and develop speech?
What is the most common type of profound congenital hearing loss?
Non-syndromic hearing loss
What causes non-syndromic hearing loss?