When an aircraft flies over, my big glass window vibrates, making a ticktack beating. Its frequency sounds low, less than 10 beats per second actually. I'm wondering about the mechanism of this phenomenon. I have vague memory of supersonic plane and infrasound stuff from high school class long before. Not sure about the correctness and whether it really applies here. BTW, the aircraft doesn't look supersonic. It's not certain. But I guess it's not crucial here.
Is it caused by infrasound produced by aircraft? And how? The resonance of the window is subject to infrasound, why can I hear it? My tentative guess is I mingled the fequency of the audible ticktack beating with some other concept. Please kindly shed light.
[Physics] When an aircraft flies over, glass window vibrates…Infrasound
aerodynamicsaircraftresonancevibrations
Related Solutions
Lift is a function of the speed of the air from the leading edge to the trailing edge. In a flat turn, the inner wing is moving slower than the outer wing therefore there will be a difference in the amount of lift produced.
But in fact, an airplane can not change direction by flat turning this way. Rolling into the turn by the use of the ailerons is the way a plane turns. This causes part of the lift to be directed into the turn and used to pull the plane around the turn. Think vectors.
The slowed inner wing will still produce less lift and the rudder is used to compensate against the tendency to slip into the turn further. The elevator is used to raise the angle of attack again to compensate for decreased vertical lift in the the turn. Angle of attack is the angle that the wing makes relative to the air flow. A higher angle of attack at the same speed creates more lift. To a point.
It creates shock waves, which under the right conditions like a supersonic rocket did in this picture, causes concentric cloud rings. Clouds are essentially just volumes where the humidity, temperature, and pressure are such that the air is locally supersatured with water. The craft passing through the cloud will send out waves that disturb the pressure, changing the saturation and causing visible ripples.
EDIT: For a diagram of what is happening here, see this image.
Best Answer
I think this has to do with sync of the oscilation of the glass molecules and the air molecules.
When the planes passes over your house the air molecules approach the frequency that the glass moleculs oscilate, thus making the amplitude of oscilation bigger. That is why the glass vibrates.