Sound Properties and Hearing Flashcards
________ waves are partially transverse and partially longitudinal
Water or sea
__________ consist of cycles or patterns that are produced over and over again by the source; with simple harmonic motion
Periodic waves
________ is a vibration of molecules that goes back and forth kaya parang wave yung graph
Sound
The _________ is the maximum excursion of a particle of the medium from the particle undisturbed position
amplitude A
The __________ is the horizontal length of one cycle of the wave
wavelength
The _________ is the time required for one complete cycle.
Time of one cycle, unit is sec.
period
The _________ is related to the period and has units of Hz (Hertz), or s-1 .
_____ number of cycles per second
f = 1/T
frequency
20 Hertz means that the vibration goes 20 times back and forth in one second..
High frequency = faster
Bigger instrument = higher frequency or lower frequency?
lower frequency
_______ travels through gases, liquids, and solids at considerably different speeds
Sound
__________ is each person’s subjective perception of a sound wave, which cannot be directly measured
Pitch
The __________ is the number of cycles per second.
frequency
Does higher frequency mean higher pitch or lower pitch?
higher pitch
When the sound is near you, the frequency tends to ________ and when it goes far from you, the frequency tends to _______
Compress; expand
What are the two types of waves?
_____ - perpendicular to the direction of the wave
_____ - parallel to the direction of the wave
Transversal wave
Longitudinal wave
Higher frequency; short-wavelength; lots of waves; high sound
true
Lower frequency; longer wavelength; few waves
true
Sound waves are examples of the longitudinal or transverse waves?
longitudinal
Does Individual air molecules are carried along with the wave??
No, because air molecules ay yung hininga na hindi naman nasasama sa wave
A sound with a single frequency is called a _______
Ex: yung pag sasalita ng isang tao ay nde pure tone
pure tone
The brain interprets the frequency in terms of the subjective quality called _________
pitch
_________ is an attribute of a sound that depends primarily on the pressure amplitude of the wave
Loudness
Change in pressure corresponds to _________
loudness
Increase in amplitude = increase in ______
volume
P-waves = longitudinal wave
S-wave = transverse wave
Different speed ng wave pag may Earthquake because of there are different materials ang Earth
Ex: speed of wave is faster in granite than in sediments
Speed of Sound are affected by:
______________
______________
Density or material
temperature
Does the speed of sound depend on frequency?
no ; only density and temperature affect the speed of sound
low-frequency sounds must have a greater wavelength or lower wavelength?
Greater wavelength
lower-frequency sounds are emitted by the large speaker, called a ________
woofer
higher-frequency sounds are emitted by the small speaker, called a _________
tweeter
PART 2: SOUND INTENSITY
Sound waves carry energy that can be used to do work
The amount of energy transported per second is called the _______ of the wave
power
The _________ is defined as the power that passes perpendicularly through a surface divided by the area of that surface.
sound intensity
What is the threshold of hearing of humans? Or the SMALLEST SOUND INTENSITY that human can hear?
1000 Hz tone that corresponds to 1x10^-12W/m2
continuous exposure to intensities greater than _______ can be painful
1W/m2
The __________ is a measurement unit used when comparing two sound intensities
decibel (dB)
The ________ is the change in frequency or pitch of the sound detected by an observer because the sound source and the observer have different velocities with respect to the medium of sound propagation
Doppler effect
When the truck is at rest, the frequency is ________.
constant
When the truck is moving towards you, frequency ________ and wavelength _________
increases ; compress
When the truck is moving away from you, the frequency _______ and the wavelength _______
Decreases; expands
What is the relationship between wavelength and frequency?
inversely related
probe that are used in the removing of tumor
Cavitron Ultrasonic Surgical Aspirator (CUSA)
measure the speed of the blood flow using transmitting and receiving elements and detect fetal heart
Doppler Flow meter
you need specific intensity level (dB) is needed for you to be able to hear certain frequency of sounds
TRUE
When the waves are same with each other and are said to be in exactly in phase
Constructive interference
Where waves are said to be exactly out of phase
So if two waves add up, it will result to just flat wave
Destructive Interference
