Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby to hear. Headphones are also known as earspeakers, earphones or, colloquially, cans. Circumaural and supra-aural headphones use a band over the top of the head to hold the speakers in place. The other type, known as earbuds or earpieces consist of individual units that plug into the user's ear canal. In the context of telecommunication, a headset is a combination of headphone and microphone.
Osmium is usually sold as a minimum 99.9% pure powder. Like other precious metals, it is measured by troy weight and by grams. Its price in 2012 was about $400 per troy ounce (or about $13,000 per kilogram), depending on the quantity and its supplier.
Answer: 1 oz(troy) = 31.1034 g or divide the current price of troy ounce of gold by 12.44. At $800.00 per troy ounce it would be worth in Gold $64.31. Gold in small bars is ty â¦ pically priced at a premium because of obvious handling charges and seller charges.71.03 as of 6/23/08. Right now as of July 3rd 2010, the price of gold is $1200 a Troy Ounce. A Troy Ounce is about 31.1 grams so: 1200/31.1 * 2.5 = $96 for 24 karat gold. Regards.