How Loud is a Scooter

[Ingah]

Anyone know (roughly) how loud a scooter is at 30mph, in decibels? (it's a 2-stroke if anyone has information that specific )

Have seen some helpful graphs showing motorcycle speed vs db in the past, but i can't remember where.
____________________
-- Ingah

[Whosthedaddy]

Are there too many variables to answer this question correctly?
____________________
Current : MSX 125 Past : CBR 900RR Monkeybike : c50 LAC : ZXR750 H2 : FZR600 : ZX7R P3 : YW100 : TRX850: Trophy 900 T309 : GSXR 600 L0: Monkeybike : XJ6S Whosthedaddy

[Amreet]

[Ingah]

[Frost]

Remember that decibels is not a linear scale, so 160db is most definitely NOT twice as loud of 80

All those volume measures all depend on the revs, exhaust and position of the bike relative to you. E.g standard exhaust, high gearing, no throttle 4 stroke coming towards you could be as low as 20db.
Race exhaust on a 2 stroke riding away from you with full throttle and short gearing can be ear splitting. I once followed a 2 stroke moped that made my ears hurt and i was in a car 30m behind it

[neil.]

Also at what distance are you measuring the loudness as every time you double the distance from a point source, you lose 6dB of sound pressure level.
____________________
CBT February 2008 | A2 June 2008 | Yamaha YBR125 (written off) | Honda CBF125 (current)

[G]

Will vary massively, ignoring the fact you haven't mentioned distance, 'scooter' covers a wide range of options - some may be quite quiet at 30mph (for instance a stock 180cc that's geared quite high) while another may be pretty loud - for instance a 50cc with a loud exhaust, still geared for 30mph.

[hazzern]

Very loud if its a two stroke, gets pedestrians moving if there trying to cross infront of you!