Worx leaf blower and vacuum (outlet, volume, control)
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how is it possible that 2 leaf blowers/vacuum have different mph with the same cfm and still have the same noise level of 50 db? One is Worx 120 mph 350 cfm 12 amp and the other is 210 mph 350 cfm 12 amp. Like I said both of noise level of 50 db. Base on 50 db it's safe not to use ear protection but I see people using ear protection when using this.
how is it possible that 2 leaf blowers/vacuum have different mph with the same cfm and still have the same noise level of 50 db? One is Worx 120 mph 350 cfm 12 amp and the other is 210 mph 350 cfm 12 amp. Like I said both of noise level of 50 db. Base on 50 db it's safe not to use ear protection but I see people using ear protection when using this.
Assuming the CFM is accurate the only thing that would explain a difference is the size of the hose/nozzle.
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Originally Posted by AstralProjection
how is it possible that 2 leaf blowers/vacuum have different mph with the same cfm and still have the same noise level of 50 db? One is Worx 120 mph 350 cfm 12 amp and the other is 210 mph 350 cfm 12 amp. Like I said both of noise level of 50 db. Base on 50 db it's safe not to use ear protection but I see people using ear protection when using this.
The specs do not control the noise level.
The design of the motor, the blades, the shape of the outlet determine the nose level during maximum output. Most of the noise is generated by the motor and the blade design.
If the output (CFM) is the same, I would buy the higher mph wind speed. Gets the whatever is laying on the ground moving earlier and faster!
I would 'always' wear 'ear and eye' protection when using 'any tool'.
(maybe not always ear protection, but ALWAYS eye protection!
Well, windspeed developed is cfm divided by the exit nozzle area.
Noise is governed almost totally by the details of fan design. Tip speed, whether the fan is a ring fan or open tips, passing frequency across structural elements, whether it's got backward or forward curved blades, etc., etc., etc. are all factors that drive noise generated by a fan.
Heck, the two units could have completely different fan types altogether.
It is absolutely possible that two units with the same rated volume flow rate and different output velocities could have the same noise output.
So, unless you happen to be a turbomachinery expert who also knows the details of the fan design of each of the two units being described, you have absolutely no grounds for asserting that anyone is lying or is not lying.
Are you qualified to comment, or not? Let's hear your experience in fan design.
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