Not the Doppler effect, as that only applies to moving objects, but instead the inverse square law, where the energy of the sound wave decreases by the square of the distance from the origin, since it spreads in a sphere with the energy being spread across the surface of the sphere, resulting in a very quick dropoff in the loudness.
Emily the engineer - https://youtube.com/@emilytheengineer - Does fun projects with 3d-printing
Evan and Katelyn - https://youtube.com/@evanandkatelyn - Does a lot of DIY/arts&crafts
Nerdforge - https://youtube.com/@nerdforge - Maker/Arts&Crafts, does a lot fantasy based stuff
Physics girl - https://youtube.com/@physicsgirl - Physics stuff, she has struggled with health issues the last couple of years, but her old stuff is still very good
Laura Kampf - https://youtube.com/@laurakampf - Maker, does a lot of woodworking and upcycling