Outer Ear Flashcards
What are the three main functions of the outer ear?
SOUND TRANSMISSION, SOUND LOCALIZATION, MIDDLE AND INNER EAR PROTECTION
The Ear canal is also known as:
EAM
what is the range of audibility for the average human
20-20000 HZ
Since the pinna does not contain any bones, what is it made up of?
CARTILAGE
What does vestigial mean?
IT DOESN’T WORK
What are the 2 areas of the temporal bone that the auricle attach to?
ZYGOMATIC BONE, MASTOID BONE
What 2 glands contribute to the secretion of cerumen in the EAM?
SEBACIOUS GLAND, CERUMINOUS GLAND
What is the pinna’s overall best resonant frequency at?
5000 HZ
What is the EAM’s overall best resonant frequency is at?
2500
What is the range of resonant frequencies for the outer ear?
2000-7000 HZ
What is anotia?
CONGENITAL ABSCENCE OF PINNA
What is the congenital absence of the EAM?
AURAL ATRESIA
