https://www.khanacademy.org/science/grade-7-science-snc-aligned/x64f379bc07a3640a:waves-and-energy/x64f379bc07a3640a:sound-an-example-of-longitudinal-waves/v/sound-is-produced-from-a-vibration-ur 2025-08-08T00:24:37.843818748Z Sound is produced from a vibration Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sound is produced from a vibration Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/4w83n1DAQ1A.mp4/4w83n1DAQ1A.mp4 154 Sound waves https://www.khanacademy.org/science/ms-physics/x1baed5db7c1bb50b:waves/x1baed5db7c1bb50b:sound-waves/v/sound-waves 2025-07-08T16:57:45.977981796Z Sound waves Sound is a compression wave. Sound waves require a matter medium (solid, liquid, or gas) to travel through, and cannot travel through vacuum. The amplitude of a sound wave corresponds to its loudness. The frequency of a sound wave corresponds to its pitch. The speed of a sound wave depends on the medium its traveling through. Sound waves exhibit wave behaviors like reflection, which are useful in a variety of applications. Waves intro and Sound waves by PhET Interactive Simulations, University of Colorado Boulder, CC BY 4.0. https://phet.colorado.edu/en/simulations Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/b5f933c6-a02a-461d-80fb-fea0d1c7d1d3_1280_720_base.png Sound waves Sound is a compression wave. Sound waves require a matter medium (solid, liquid, or gas) to travel through, and cannot travel through vacuum. The amplitude of a sound wave corresponds to its loudness. The frequency of a sound wave corresponds to its pitch. The speed of a sound wave depends on the medium its traveling through. Sound waves exhibit wave behaviors like reflection, which are useful in a variety of applications. Waves intro and Sound waves by PhET Interactive Simulations, University of Colorado Boulder, CC BY 4.0. https://phet.colorado.edu/en/simulations https://cdn.kastatic.org/ka-youtube-converted/9u1PjsBfrmg.mp4/9u1PjsBfrmg.mp4 513 Sound waves https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/sound-topic/v/production-of-sound 2023-09-10T17:11:17.624018169Z Production of sound Sound is vibrating air. But how does the air start vibrating? Explore the intriguing science of sound waves and how they travel. Learn how speakers use oscillation to create sound, and discover why sound waves can transport energy without moving the medium itself. Uncover the mystery behind the difference in our voices in person and on recordings. David SantoPietro video https://cdn.kastatic.org/googleusercontent/2pU7GrgIlY3-xI19NU94rl-9GUvs7ZUNRg1RlHiQ4CTZIwCFyXzwHO6WkTz7PbKhaw90s3zRF-VJ32Enk_JepbUH Production of sound Sound is vibrating air. But how does the air start vibrating? Explore the intriguing science of sound waves and how they travel. Learn how speakers use oscillation to create sound, and discover why sound waves can transport energy without moving the medium itself. Uncover the mystery behind the difference in our voices in person and on recordings. https://cdn.kastatic.org/ka-youtube-converted/nGKffdaI4Pg.mp4/nGKffdaI4Pg.mp4 226 Sound waves https://www.khanacademy.org/science/ms-physics/x1baed5db7c1bb50b:waves/x1baed5db7c1bb50b:sound-waves/e/understand-sound-waves 2026-04-07T22:59:30.107127435Z Understand: sound waves Check your understanding of sound waves in this set of free practice questions. Emily Cizmas exercise https://www.khanacademy.org/science/grade-7-science-snc-aligned/x64f379bc07a3640a:waves-and-energy/x64f379bc07a3640a:sound-an-example-of-longitudinal-waves/v/sound-can-travel-in-liquids-ur 2025-08-08T00:24:37.843818748Z Sound can travel in liquids Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sound can travel in liquids Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/MNAroW4mQFI.mp4/MNAroW4mQFI.mp4 56 Sound waves https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:types-of-sound-transmission-of-sound-reflection-of-sound/e/types-of-sound-their-transmission-and-reflection 2026-04-08T01:15:04.085520103Z Types of sound, their transmission and reflection Let's solve questions on types of sound, transmission and reflection Vibhor Pandey exercise