A standard electret microphone can detect sub-audio "sounds" when some simple equalization circuitry is added.

A visually striking demonstration of a large foam remote-controlled plane performing smooth and skillful flight maneuvers.

Here is the list of all the new Paper Plane Simulator codes that will give you free potions, wins, and other boosts to go ...

President Donald Trump insists he’s getting a “free ... proposed interim plane deal as “a corrupt bargain” and a distraction from the work needed to deliver the two planes under contract.

Senior veterans had the chance to fly high in the sky Tuesday morning as part of the non-profit group, Dream Flights.

That would appear to be the case with the latest White House dust-up, this one involving a “free” plane from Qatar. The Middle Eastern nation is reportedly considering donating a 10-year-old ...

The three Oklahomans who flew in the plane are from Touchmark at Coffee Creek and are the first veterans from that community who got to do the free flight. Representatives from Dream Flights and ...

(CNN) — Democrats are leaning into a corruption argument against President Donald Trump, pointing to his crypto meme coin and plans to ... don’t want a free, very expensive airplane.’ ...