Physics of Sound and Anatomy Flashcards
6 cards from real CAOHC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Physics of Sound and Anatomy flashcards as text
What is the function of the ossicular chain in the middle ear?
Answer: To amplify and transmit sound vibrations from the tympanic membrane to the oval window
The three ossicles form a mechanical lever system that amplifies sound vibrations approximately 25-30 dB as they transfer energy from the tympanic membrane to the oval window.
Which structure in the cochlea contains the sensory hair cells responsible for hearing?
Answer: The organ of Corti
The organ of Corti contains the inner and outer hair cells that convert mechanical vibrations into electrical nerve impulses.
What is the frequency range of normal human hearing?
Answer: Approximately 20 Hz to 20,000 Hz
Normal young human hearing spans approximately 20 Hz to 20,000 Hz, with maximum sensitivity between 1,000 and 4,000 Hz.
What property of sound determines its perceived loudness?
Answer: Amplitude (intensity)
The amplitude or intensity of a sound wave determines how loud it is perceived, measured in decibels.
How does the basilar membrane in the cochlea separate different sound frequencies?
Answer: Through tonotopic organization with the base responding to high frequencies and the apex to low frequencies
The basilar membrane is tonotopically organized: narrow and stiff at the base for high frequencies, wide and flexible at the apex for low frequencies.
What is the function of the Eustachian tube?
Answer: To equalize air pressure between the middle ear cavity and atmospheric pressure
The Eustachian tube connects the middle ear to the nasopharynx and opens during swallowing and yawning to equalize pressure.