References for Vehicular noise ordinance for Encinitas

Work sheet for consideration of vehicular noise ordinance for Encinitas 

Article and video on 2015 Jaguar Sports that comes equipped with a special "sport sound" noise enhancer that was measured at close to 100db.  With this feature, disturbing damaging, and physically harmful noise will become a feature for the conspicuous consumption set. 
 
Link to Journal article:  Noise Pollution: A Modern Plague
 http://www.medscape.com/viewarticle/554566_3

"Uninterrupted sleep is known to be a prerequisite for good physiologic and mental functioning in healthy individuals.^[28] Environmental noise is one of the major causes of disturbed sleep.^[1,10] When sleep disruption becomes chronic, the results are mood changes, decrements in performance, and other long-term effects on health and well-being.^[3] Much recent research has focused on noise from aircraft, roadways, and trains. It is known, for example, that continuous noise in excess of 30 dB disturbs sleep. For intermittent noise, the probability of being awakened increases with the number of noise events per night.^[1]"

This article is a survey of  the myriad harmful effects of interrupted or fractured sleep
http://www.medscape.com/viewarticle/820529
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Vehicle noise regulation,  a detailed introduction from Conn. on legal and physical issues,

California vehicle noise code, 27200 et seq,
Note clause  27202-1 (3)  that excludes state preemption that may allow city ordinance to be enforcable.
  
Loud Pipes' Cost: Harley-Davidson Tries to Quiet Motorcycle Noise

This is a list of noise of various automobile Mufflers listed by Decibels at idle and full throttle of over 110 DB

Extensive public forum on "loud motorcycles, laws against and push back by bikers. "