What Are UltraSonic Waves
What are UltraSonic Waves?
Ultrasonic waves are sound waves with frequencies high about human hearing and short wave lengths. Sound waves have frequencies about 20,000 to 100,000.
Also
Ultrasound frequencies range from 20 kHz (the upper range of hearing for a young adult human) through 150 kHz (audible to some bats and other creatures), right up to 10 MHz (used in some medical treatments and industrial cleaning applications). While these frequencies overlap with those of radio waves, they are different because sound and ultrasound are vibrations in the air, while radio waves are electromagnetic waves that can travel in a vacuum.
UltraSound:
Basic Idea
– Send waves into body which are reflected at the interfaces between tissue – Return time of the waves tells us of the depth of the reflecting surface
SoundWaves.
Sound wave propagate by longitudinal motion
(compression/expansion), but not transverse motion
(side-to-side)
• Can be modeled as weights connected by springs
UltraSonic Waves and Properties
Mechanical waves are longitudinal compression waves
• “Ultrasound” refers to frequencies greater than 20kHz, the limit of human hearing
• For Medical imaging typically 100 Times higher frequency than audible by human typically 2 to 20 MHz
Medical Aplications:
Dentistry:
1) Is used to perform dental cleanings with a Ultrasonic escalor
2) Cleaning instruments and biosecurity
3) Ultrasonic toothbrush, is ideal for patients with motor difficulties examples paralysis
Echolocation: also called bio sonar, is the biological sonar used by several kinds of animals. Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them.
-Ultrasound:
Ultrasound is an oscillating sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from 'normal' (audible)
Ultrasonic waves are sound waves with frequencies high about human hearing and short wave lengths. Sound waves have frequencies about 20,000 to 100,000.
Also
Ultrasound frequencies range from 20 kHz (the upper range of hearing for a young adult human) through 150 kHz (audible to some bats and other creatures), right up to 10 MHz (used in some medical treatments and industrial cleaning applications). While these frequencies overlap with those of radio waves, they are different because sound and ultrasound are vibrations in the air, while radio waves are electromagnetic waves that can travel in a vacuum.
UltraSound:
Basic Idea
– Send waves into body which are reflected at the interfaces between tissue – Return time of the waves tells us of the depth of the reflecting surface
SoundWaves.
Sound wave propagate by longitudinal motion
(compression/expansion), but not transverse motion
(side-to-side)
• Can be modeled as weights connected by springs
UltraSonic Waves and Properties
Mechanical waves are longitudinal compression waves
• “Ultrasound” refers to frequencies greater than 20kHz, the limit of human hearing
• For Medical imaging typically 100 Times higher frequency than audible by human typically 2 to 20 MHz
Medical Aplications:
Dentistry:
1) Is used to perform dental cleanings with a Ultrasonic escalor
2) Cleaning instruments and biosecurity
3) Ultrasonic toothbrush, is ideal for patients with motor difficulties examples paralysis
Echolocation: also called bio sonar, is the biological sonar used by several kinds of animals. Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them.
-Ultrasound:
Ultrasound is an oscillating sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from 'normal' (audible)