"Quiet" pumps for Chinese Diesel Heaters

[@EMRLaboratories]

perfect video, 4 minutes long, gets right to the point, provides data quantitatively not qualitatively. took me a half dozen videos on other channels to find this one. thanks.

[@playing_in_trafic]

Thanks so much. I appreciate the comment. Glad you found it gave you the data you were looking for in a timely manner. That’s what I was aiming for. Atb Dave

[@dougc.1773]

3db is 1/2 of perceived sound level @ 1 meter using C-weighting curve.

[@Tomlinsky]

3db is a 50% reduction linearly. 10db is closer to what most people 'perceive' as a 50% drop in volume. Even in this video it clearly isn't 3+ times quieter perceptually.

[@101markharris]

shame it doesant work

[@playing_in_trafic]

@@101markharris Yet I literally showed it working in the video. So your comment makes zero sense.