Ultrasound
Please note: The videos on this page are designed to be used in a classroom environment. Therefore, audio descriptions and captions will not be provided for this content as doing so would invalidate the classroom task.
Science KS4 Lesson 1: Ultrasound
Screen 1.1: The main Tunnel links all the Combined Sewer Overflows (CSOs). Each site will have ventilation structures at ground level. The Tunnel needs to meet strict regulations for air emissions quality. Click next to explore how ventilation systems in the Tunnel operate.
Screen 1.2: The Tunnel will include different types of ventilation. At Abbey Mills, we will install one of the main ventilation systems. This will draw air through the Tunnel when it’s empty. The air will enter the Tunnel at Blackfriars Bridge.
Screen 1.3: It’s also important to know how much water is captured in the Tunnel, to ensure we can prevent additional flows entering the Tunnel once it is full, and to regulate the air management system.
Screen 3.1: Ultrasound is a type of sound that’s too high-pitched for us to hear. Click on the right answer.
3.1b: Correct answer
Screen 3.2: Look at the diagram and explore the relationship between wave speed, wavelength and frequency.
3.2b: Correct answer
Screen 3.3: Sensors send out pulses that bounce back when they hit a reflective surface. Click next to see how the pulse shortens as the water level rises.
3.3b: Answer
Screen 3.4: Sensors send out pulses that bounce back when they hit a reflective surface.