vues
3:34
How Sound Works (In Rooms)
1:55
Properties of Sound Waves Lesson Loudness Pitch and Quality
2:49
How can Radio Waves GO THRU WALLS but Light Can't?
1:41
How Does Ultrasound Work?
2:33
Sound Waves: High Pitch and Low Pitch
5:49
Sound: Wavelength, Frequency and Amplitude.
3:54
What is Sound? | The Dr. Binocs Show | Learn Videos For Kids
8:09:24
8 Hours of Powerful Theta Waves Healing: Deep Meditation • Sleep • Rise Intuition • Improve Memory
