Latest news with #sound
CBS News
2 days ago
- Science
- CBS News
Resonant frequency fun
If you have ever rubbed a clean, wet finger on the edge of a wine glass, you may have heard the wine glasses make a singing sound. They say you can't hear pictures, but I bet you can hear this one! Ray Petelin As your finger moves along the rim of the glass, it sticks and slides. This causes the glass to vibrate. According to if you reach the glass's resonant frequency, or the natural frequency at which the glass will vibrate the most and create a sound of the same frequency. You can change that frequency by adding or removing water. This makes the sound higher and lower in the glass by changing the resonant frequency and lowering the pitch. A simple experiment that you probably have seen before. We are going to take this experiment an additional step. Alright, right now, there are no vibrating molecules in the air, so it's quiet! Ray Petelin We can't hear anything if molecules in the air aren't vibrating. We know the glass is vibrating to create a sound, but those sound waves are traveling through the air molecules for us to be able to hear them. This means, if we have another glass with a similar resonant frequency, we can send vibrations from one glass to another through the air. So we need another wine glass. Some call this a party, I call it science! Ray Petelin If we set the glasses next to each other, but don't allow them to touch. Make sure to fill them as close to the same amount as you can. Set a toothpick or two on the rim of one of the glasses. This toothpick is key to our high-pitched experiment. Ray Petelin Then, wet your finger and create sounds with the other glass. You will see the toothpicks fall into the glass! This happens because the vibrations from one glass travel to the other through the air. Down goes the toothpick! Ray Petelin Since they both have the same resonant frequency, they both vibrate! You can test your friends by saying you bet they can't make the toothpicks fall into the glass without touching or blowing them in. When they can't figure out how to do it, perform the experiment. Sweet music and science!
Arab News
6 days ago
- Business
- Arab News
SLS Expo 2025 propels Vision 2030 infrastructure goals
The three days of Saudi Light and Sound Expo 2025 reinforced the event's position as a central platform for advancing Saudi Arabia's professional lighting, sound, and AV technology sector. With broad international participation and a focus on actionable business outcomes, SLS Expo continues to support the Kingdom's Vision 2030 goals by accelerating infrastructure development and building strategic industry capabilities. Global and regional stakeholders convened to explore new solutions and partnerships essential to Saudi Arabia's growing live event production market. The exhibition featured 127 exhibitors from 21 countries, including Saudi Arabia, the UAE, US, China, and Italy, showcasing technologies designed for high-performance venues, immersive experiences, and large-scale productions. Several significant agreements were signed, contributing to Saudi Arabia's infrastructure and capability-building objectives. The MoU signing between Saudi Entertainment and Events Management Academy and IPS marked the beginning of a strategic partnership aimed at enhancing talent development in the live events sector in Saudi Arabia, aligning its goals with the Kingdom's Vision 2030. Additional MoUs formalized as the event progressed, reflecting the Kingdom's broader strategy to attract global expertise, foster local skills development, and support the execution of major national projects. At the heart of the show's programming was the SLS Summit, supported by sponsors IPS, Shure, Procom, Venuetech, Proloab, RST, SONOS, ShowPower and Media Pro. More than 40 international speakers delivered expert-led sessions across topics including smart production, sustainable AV, immersive design, and next-generation venue infrastructure. One of the standout sessions, Stadiums 2.0, explored how integrated AV systems and architectural design are enabling a new era of live event experiences. 'What we saw at SLS Expo was not just about momentum, it was focused, results-driven engagement that's shaping the sector's future,' said Sarkis Kahwajian, associate vice president at dmg events. 'The MoUs already confirmed, and those in development, speak to the depth of commitment across the public and private sectors.' Hands-on features such as the Shure Wireless Workshop provided live audio professionals with opportunities to deepen their technical capabilities and engage in peer learning through practical demonstrations and real-time troubleshooting. SLS Expo is supported by the Kingdom's General Entertainment Authority and the Ministry of Investment of Saudi Arabia. The event continues to serve as a strategic business environment where government entities, technology providers, integrators, and venue operators align around a shared vision for growth. Co-located with the Saudi Entertainment and Amusement Expo, SLS offers a complete ecosystem for live event professionals seeking to connect, collaborate and contribute to the development of Saudi Arabia's AV and production sectors.
