Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
High and Low Sounds
What makes a sound high or low? 🎹 Press the keys and watch waves appear below. The higher the sound, the closer together the waves are—because they vibrate more times each second. ✖️ Now choose two sounds and layer them. When one vibrates exactly twice as fast, they become the «same-named note»—an octave apart. Four times as fast makes two octaves! 📏 Finally, strings. Why does shortening a guitar or gayageum string make a higher sound? Cut its length in half and it vibrates exactly twice as fast—length × vibrations always stays the same. This app was made with code too · Remix it and measure the pitch of your own voice!
When Vibrations Become Sound
〰️ What happens when we halve a wavelength? The number of vibrations doubles! At the same speed, «length» and «frequency» move in opposite directions. Watch the curve become more tightly packed before your eyes. 🔊 When you hear the wave, frequency becomes «pitch» and amplitude becomes «volume». Yet some sounds with the same pitch and volume still sound different. Find out why a piano and violin play the same note differently—listen for yourself. 🏃 Finally, discover what carries sound. Ring a bell in a vacuum and you hear nothing. Sound travels fourteen times faster through steel than through air—that’s why a train can be heard sooner with your ear on the rail. This app was made with code too · Shall we remix it and add an echo?