The world's highest recorded surface temperature is 56.7 Â°C (134 Â°F) measured at Greenland Ranch in Death Valley, California, USA on July 10, 1913. The mean temperature in Dallol, Ethiopia is 34.4 Â°C (94 Â°F), the highest annual average temperature on earth.
The Wave System III is made in Columbia South Carolina. The Bose A20 and A20 Bluetooth headsets are made in the United States. The US made Bluetooth Headphones they provide are the the most advanced BoseÂ® aviation headset yet, and they are still US made. The A20Â® Aviation Headset is used primarily in the aviation industry.
How Noise-canceling Headphones Work. Bose was the first company to introduce noise-canceling headphones. See more pictures of essential gadgets. One man's noise is another man's music, but no matter what your taste, ambient noise is the enemy. Luckily, there's a piece of audio equipment designed especially to maximize your listening experience, keeping ambient noise out without sacrificing your music's sound quality.