As opposed to what, air horns? They're electrically powered...Jesda wrote:Does the Q use an electronic horn?
140db, you say. Is that rated in actual decibels? Or is it one of those weird rating scales where they measure ever 10db increase as a doubling of sound?AZhitman wrote:Search my posts, I have a 140 dB horn (ebay) that is amazing, and easy to mount.
Depends on how far you are from it. I can think of many things that generate close to 140dB SPL if you are close enough to them! I would not be surprised if a car horn at a few inches is that loud or near it. Since I have an SPL meter, I think I will check it sometime soon.PoorManQ45 wrote:140db, you say. Is that rated in actual decibels? Or is it one of those weird rating scales where they measure ever 10db increase as a doubling of sound?
140db would cause you to go deaf. IIRC, 120db is enough to make most people go deaf.
Um.... ok, like I said, every 3db increase creates a true doubling of sound "loudness". Even though the change in "loudness" may not be noticable, it is still a doubling.AZhitman wrote:Because the dB scale is logarithmic, every 10dB = a doubling in perceived sound.
yes, but a 3db increase in sensitivity of a driver will amount to to the same "volume" output at half the power. Example. A driver with a sensitivity of 92db 1w/1m requires half the power that a driver with a sensitivity of 89db 1w/1m requires to produce a 95db spl. BTW. the 92db driver would require ~2w. The 89db driver would require ~4w.AZhitman wrote:As regards car audio, an increase of 3dB requires a doubling of amplifier power.