Drone vs Helicopter | Comparison of noise generation

I didn't realize how small that model was, omg

Also yes small rotor diameter leads to efficiency losses and lots of noise. Also having the discs not being parallel might also increase yaw power at the expense of upward thrust.

That drone isnt noisy at all!

small motor and small blades turning at high rpm = more noise. Bigger motor turning at lower rpm = lower noise.

The helicopter can be converted to a direct drive that will be so silent that you only wish that it is louder. I FPV my 250 gram helicopter with purely direct drive main and tail motors.

I am like you I don't like the sound of the drone.
I call it a high-pitched screaming sound.

I fly the typhoon h480 it's very nice and quiet compared to the DJI little mini.

It's like a mad swarm of bees

The pro 3 has silicon tips on the props. Sounds quieter than 2. We'll see how long they last.

I loved building 450's Flybarless.

Can you make one Axis gyro for rc helicopter for tail motor ( brushed motor) using MPU6050 module please I'm waiting for your positive response

I don’t know what you are hearing or not hearing but the helicopter was making a terrible non fundamental harmonic frequency that was like nails on a chalkboard. Does nobody else notice this? I got 3 min in before I couldn’t take it anymore. Yes the drone is loud, but all of it’s harmonic frequencies and amplitudes were more evenly balanced. None actually stood out but the helicopter on the other hand, had that one frequency above the rest that stood out like a sore thumb.