Some people who attend the World Cup games enjoy blowing plastic horns called vuvuzelas, which are loud and make an ugly sound. Trevor Cox, president of the UK Institute of Acoustics explained to New Scientist why they sound so awful.
The vuvuzela is like a straightened trumpet and is played by blowing a raspberry into the mouthpiece. The player's lips open and close about 235 times a second, sending puffs of air down the tube, which excite resonance of the air in the conical bore. A single vuvuzela played by a decent trumpeter is reminiscent of a hunting horn – but the sound is less pleasing when played by the average football fan, as the note is imperfect and fluctuates in frequency. It sounds more like an elephant trumpeting. This happens because the player does not keep the airflow and motion of the lips consistent.
If you’ve bought a premium smartphone handset over the past few years, it’s a safe bet that it came equipped with wireless charging technology baked into it. Wireless charging is wicked cool! In the Long, Long Ago, we had to carry one of the many USB cables most of us had kicking around our home […]
Graham Clark, the 17-year-old Florida boy accused of pulling off the big Twitter hack, pled not guilty to charges on Tuesday. During the security breach, top accounts including Democratic presidential candidate Joe Biden and Tesla/SpaceX CEO Elon Musk were taken over to push a bitcoin scam.
In this footage, a supercomputer’s CPU cores — nearly 900 of them — are neatly lined up in the Task Manager. The Doom logo appears, generated by code that targets each core. Then Doom itself plays, each “pixel” generated by thrashing a core with just the right amount of busy work. Max Holt: Finally got […]
If you want swole arms cut like tree trunks, you start savaging the curl bars. If you want to sculpt a tight, firm core, you have lots of planking and bridges in your future. So what do you do if you want to knock out that double chin? Or put a little added definition into […]
Considering the state of our world, it probably shouldn’t come as a surprise to find lots and lots of people pushed to their breaking point. Anxiety and stress are often constant companions during the best of times. But now, with fear and frustration running rampant, it’s easy to be subsumed by all the distractions and […]
Most of us aren’t constantly beset by poor posture. But all it takes is some subtle misalignment while you’re doing serious hours behind the wheel driving or working away at a desk to do a real number on your back. In fact, most of us are so unaware of the mechanics of good posture that […]