Sound and Hearing Physics

Physical principles of sound waves, hearing mechanics, and auditory processing as tested in MCAT physics and biology sections

Level
intermediate
Languages
en → en
Cards
48
Markdown
Sound and Hearing Physics (.md)

Flashcards (48)

#Front (Term / Question)Back (Definition / Answer)ExampleMultiple-Choice Options
1How does temperature affect the speed of sound?The speed of sound increases with an increase in temperature due to faster particle motion.
2What is the principle of superposition?The principle of superposition states that when two or more waves overlap, the resultant wave is the sum of the individual waves.
3Define wavelength in sound waves.Wavelength is the distance between successive crests or troughs of a wave, inversely related to frequency.
4What is auditory fatigue?Auditory fatigue is a temporary reduction in hearing sensitivity following exposure to loud sounds.
5How do hair cells in the cochlea function?Hair cells in the cochlea convert mechanical vibrations into electrical signals that are sent to the brain.
6Define longitudinal wave.A longitudinal wave is a wave in which the particle displacement is parallel to the direction of wave propagation.
7What is a sound wave's phase?Phase refers to the position of a point in time on a waveform, often expressed in degrees.
8What is the significance of the fundamental frequency?The fundamental frequency is the lowest frequency of a periodic waveform, determining the pitch of the sound.
9What are the two main types of sound waves?The two main types of sound waves are longitudinal waves and transverse waves.
10What is the phenomenon of sound diffraction?Sound diffraction is the bending of sound waves around obstacles or through openings.
11What is sound?Sound is a mechanical wave that propagates through a medium (solid, liquid, or gas) as a result of vibrations.
12What are the three bones of the middle ear called?The three bones of the middle ear are the malleus (hammer), incus (anvil), and stapes (stirrup).
13What is the Doppler effect?The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.
14What is the auditory nerve?The auditory nerve transmits auditory information from the cochlea to the brain.
15What is resonance in sound?Resonance is the phenomenon that occurs when an object vibrates at its natural frequency due to an external force.
16What is a sound wave's compression?Compression is the region in a longitudinal wave where particles are closest together.
17What is the difference between noise and music?Noise is typically considered to be an unpleasant or unwanted sound, while music is organized sound that is perceived as harmonious.
18What is rarefaction in sound waves?Rarefaction is the region in a longitudinal wave where particles are spread apart.
19What is the function of the auditory ossicles?The auditory ossicles amplify and transmit sound vibrations from the eardrum to the inner ear.
20What is the difference between conductive and sensorineural hearing loss?Conductive hearing loss is due to problems in the outer or middle ear, while sensorineural hearing loss is due to damage to the inner ear or auditory nerve.
21What is the relationship between frequency and pitch?Higher frequency sound waves correspond to higher pitch, while lower frequency sound waves correspond to lower pitch.
22What is the difference between constructive and destructive interference?Constructive interference occurs when two waves combine to make a larger amplitude, while destructive interference occurs when they combine to reduce amplitude.
23What is the function of the eardrum?The eardrum vibrates in response to sound waves, converting them into mechanical vibrations.
24What is the significance of sound intensity?Sound intensity is a measure of the power per unit area carried by a sound wave, affecting how loud a sound is perceived.
25What is the role of the basilar membrane in hearing?The basilar membrane vibrates in response to sound waves, helping to stimulate hair cells in the cochlea.
26What is the difference between pitch and loudness?Pitch is determined by frequency, while loudness is determined by amplitude.
27What is the speed of sound in air at room temperature?The speed of sound in air at room temperature (20°C) is approximately 343 meters per second.
28What is the role of the vestibular system?The vestibular system helps maintain balance and spatial orientation, working alongside the auditory system.
29What is frequency in the context of sound?Frequency is the number of cycles of a sound wave that occur in one second, measured in hertz (Hz).
30What is the role of the pinna?The pinna is the outer part of the ear that helps to collect and direct sound waves into the ear canal.
31What is the role of the auditory pathway?The auditory pathway transmits sound information from the ear to the brain for processing and interpretation.
32What is the inverse square law in relation to sound?The inverse square law states that the intensity of sound decreases with the square of the distance from the source.
33What is the function of the semicircular canals?The semicircular canals help maintain balance and spatial orientation, not directly involved in hearing.
34What is the role of the outer ear in hearing?The outer ear collects sound waves and funnels them into the ear canal.
35What is the role of the auditory processing center in the brain?The auditory processing center interprets and makes sense of the sounds we hear, including language and music.
36What is sound masking?Sound masking is the process of covering up one sound with another, often used in acoustics to improve privacy.
37What is amplitude in sound waves?Amplitude is the maximum displacement of particles from their rest position in a sound wave, related to the loudness of the sound.
38What is the threshold of hearing?The threshold of hearing is the minimum sound level that can be heard by the average human ear, typically around 0 dB.
39What is decibel (dB)?Decibel (dB) is a logarithmic unit used to measure the intensity of sound, where 0 dB is the threshold of hearing.
40What is the role of the tympanic membrane?The tympanic membrane (eardrum) vibrates in response to sound waves, transmitting sound to the ossicles.
41What is an echo?An echo is a reflection of sound that arrives at the listener after a delay.
42What is a sound spectrum?A sound spectrum is a representation of the different frequencies present in a sound, often displayed as a graph.
43What is the difference between a pure tone and complex sound?A pure tone consists of a single frequency, while complex sound is made up of multiple frequencies.
44What is the critical band in hearing?The critical band is a range of frequencies around a target frequency where the perception of sound is affected by other sounds.
45What is sound localization?Sound localization is the ability to determine the origin of a sound in space, relying on differences in sound intensity and timing.
46What is the range of human hearing?The typical range of human hearing is from 20 Hz to 20,000 Hz (20 kHz).
47What is the cochlea?The cochlea is a spiral-shaped organ in the inner ear that converts mechanical vibrations into neural signals.
48What is the role of the auditory cortex?The auditory cortex processes auditory information and is responsible for the perception of sound.