1 From the distance from the center of the earth to the peak of the mountain.  As mountains are generally measured from sea level, Mount Everest 29,035 ft (8,850m) is considered to be king. However, there is a difference between the highest and tallest.
You can buy acoustic ceiling tiles in either 2'x2' or 2'x4' sizes. It will cost about $1,000-$1,700 to install an acoustic ceiling system in an average 12'x14' room. Most contractors will charge between $2 and $5 per square foot for labor. A modest set of 12, 2x2 tiles can cost from $25-$40. There are more extravagant tiles which can cost as much as $100 for a set of 12.
However, these three items combined only result in approximately $1.00 per square foot in additional costs. To summarize, the costs per square foot associated with an exposed structure ceiling are as follows: ($2.25 â $3.00) Acoustical Ceiling â Cost Savings. $2.50 â $4.50 Lighting â Added Cost.