![]() The speed of sound in seawater is not a constant value. Unfortunately, the answer is really not quite that simple. Sound travels much more slowly in air, at about 340 meters per second, only 3 soccer fields a second. That’s approximately 15 soccer fields end-to-end in one second. Of course, with tiered stadium seating you have a third dimension to consider when calculating the average delay as distance does not vary as much for a flown system which tends to track the change in elevation more evenly naturally. Sound travels about 1500 meters per second in seawater. On a large stage, with a large flown system, there can be some benefit in reducing the AVERAGE delay difference but we are talking about stages with widths of 75+ feet and depths of 40+ feet. D X / S 1000 Where D is the delay (ms) X is the distance from the source (ft) S is the speed of sound (ft/s) This is equal to 1126 feet/second at sea level and standard temperature To calculate the speaker delay, divide the distance from the sound source by the speed of sound. 2 The effects of temperature and pressure variations could be estimated if one. Type in the amount you want to convert and press the Convert button. 968 feet per second, not unreasonable in the light of experiments to date. There are a handful of aircraft that fly deep in the transonic regime, including the Cessna Citation X and the Gulfstream G650. At some places on the aircraft the speed will exceed Mach 1, while at others it will be less than Mach 1. Everywhere else will NOT be time aligned.Ī compromise would be to choose an average delay of 13.5 mSec that will result in minimum aggregate error throughout the measurement domain, though technically not textbook correct for those with a Smaart hard-on.įrankly, I have not heard enough of a difference over the average listening area (on a smaller stage) to justify the effort. The following formula is used to calculate a speaker delay. Speed of sound Feet per second Precision: decimal digits Convert from Speed of sound to Feet per second. We can find the speed of sound by looking at the speed of this compressed region as it travels through the medium. At this speed, an aircraft is approaching the speed of sound but hasn’t yet reached and surpassed Mach 1. The speed of sound in dry air is 343 m/s. The only place where the delay applies is the vector radius passing from the drums (backline datum) through the speaker stack and on to infinity. Speed of sound is the speed at which sound waves move through the mediums like gas, liquid, solid and vacuum. ![]() Notice that there will be a delay error of about +2.5mSec if you measure from the center area in front of the stage. ![]()
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