TeachEngineering
Teach Engineering: Biomimicry: Echolocation in Robotics
Students use ultrasonic sensors and LEGO MINDSTORMS NXT robots to emulate how bats use echolocation to detect obstacles. They measure the robot's reaction times as it senses objects at two distances and with different sensor threshold...
TeachEngineering
Teach Engineering: Boom Construction
Student teams design their own booms (bridges) and engage in a friendly competition with other teams to test their designs. Each team strives to design a boom that is light, can hold a certain amount of weight, and is affordable to...
TeachEngineering
Teach Engineering: Don't Bump Into Me!
Students' understanding of how robotic ultrasonic sensors work is reinforced in a design challenge involving LEGO MINDSTORMS NXT robots and ultrasonic sensors.
TeachEngineering
Teach Engineering: Sound for Sight
Echolocation is the ability to orient by transmitting sound and receiving echoes from objects in the environment. As a result of a Marco-Polo type activity and subsequent lesson, students learn basic concepts of echolocation. They use...
TeachEngineering
Teach Engineering: How Does an Ultrasonic Sensor Work?
Students learn how ultrasonic sensors work, reinforcing the connection between this sensor and how humans, bats, and dolphins estimate distance.
Other
Ds Health: Prenatal Screening for Down Syndrome
This essay serves as a guide to prenatal testing for Down Syndrome and describes breakthroughs in ultrasound techniques which allow doctors to detect Down Syndrome without the need for an amniocentesis procedure.
Physics Classroom
The Physics Classroom: Sound Properties and Their Perception
The concept of pitch and frequency is covered in this tutorial. Learn what frequency and pitch are, the difference between infra sound and ultrasonic frequencies, and how pitch is related to the frequency of a sound.
TeachEngineering
Teach Engineering: Echolocation in Action!
In this activity, students will experience echolocation themselves. They actually try echolocation by wearing blindfolds while another student makes snapping noises in front of, behind, or to the side of them.
Georgia State University
Georgia State University: Hyper Physics: Ultrasonic Sound
A brief explanation of what ultrasonic sound is and the devices that produce ultrasonic sound can be found here at the Georgia State University. Scroll down the page to read how ultrasonic sound is important to bats and towards the...
Wikimedia
Wikipedia: Ultrasound
Wikipedia offers information on the basics of ultrasound, "Sound or vibrations with frequencies too high to be audible by the human ear."
Other
Sweetwater.com: What Is Infrasonic?
This resource features a basic definition of infrasonic. It also explains the difference between infrasonic and subsonic.