1.3 Flashcards
(20 cards)
Mechanical energy that is transmitted by longitudinal pressure waves in the medium
Sound
Form of energy that travels in waves
Sound
Sound is generated by
Vibrations
These act as the pebble and push the molecules of air around them outward. These molecules than bump into their neighboring molecules, creating waves.
Vibrations
Two main characteristics of sound
Pitch and intensity
Is determined by a sounds frequency, or how rapidly the sound waves vibrate each second
Pitch
Is measured in vibrations per second or hertz
Frequency
The higher, the frequency of the sound, the____ frequently, the waves vibrate, and the ___ the sounds pitch is
More and higher
Is determined by sounds amplitude, or the amount of energy in the wave
Sound intensity
What is measured by dB
Sound intensity
Outer ear parts
Pinna, external auditory canal
Middle ear parts
Malleus, stapes, tympanic membrane, incus, vestibule
Inner ear parts
Oval window, vestibular, nerve, cochlear nerve, cochlea, eustachian tube, sensory hair cells
Parts of the ossicles
Incus, malleus, and stapes
Step 1: the ___ of the eardrum causes the bones in the ____ ear to move___ and ___
Vibration, middle, back and forth
Step 2: the ___ ear of the___ moves in and out of the___ ___ at the same rate, the eardrum is vibrating
Inner, stapes, oval window
Step 3: the movement against the___ ____ causes motion in the ___ that fills the___
Oval window, fluid,Cochlea
Step 4: the movement of the fluid causes the___ in the fluid to move. This movement stimulates the attached cell to send a tiny ___ along the ___ ___ to the__
Hairs, impulse, auditory nerve, brain
Step 5: the___ is then translated into___ by the____
Impulse, sound, brain
Types of hearing loss
Sensorinueural : aging, noise, damage, drug side effects, auditorytumors, blast/explosion
mixed: genetic disorders, infections, head trauma
Conductive : fluid, foreign objects, allergies, ruptured eardrum, impacted ear wax
