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resonant frequency
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<blockquote data-quote="80INCHES" data-source="post: 742043" data-attributes="member: 559036"><p>ok i'm alot rusty but i think u have 2 measure from the floor to the roof and then from door 2 door...and then from the rear deck to the dash board...u mutliply them...and the u divide by 1130..and then u divide by 2....(i think i'm not sure its been 10 years (15 years old) since i measured incar freq.)</p><p></p><p>i.e. 2005 dodge quadcab ...floor to roof 40.4inches, door to door 66.9inches..from rear to front is 77.7inches..allthis adds up to 210004.452 cubic inches...then divide that number by 1130..and u will get 185.84..then divide that number by 4 and 46.46hz is your res. frequecy</p><p></p><p>for that truck ...</p><p></p><p>now let take a different truck</p><p></p><p>2005 cevy tahoe</p><p></p><p>floor to roof is 39.1inches..from door to door is 64.9inches...from front to rear is 107.2inches..and this up and u get 272029.648 cubic inches..divide that number by 1130..and u get 240.73..divide that by 4 and u get 60hz</p><p></p><p>so u see freq changes in different trucks</p><p></p><p>80</p><p></p><p>again these are not concreate freq...the measurements of the inside of both trucks are correct..i got them from the dealer...but as far as calculating the res freq..i'm not sure if i did it the right way...if i am right i'll be shocked as hell...but i dout if i am right</p></blockquote><p></p>
[QUOTE="80INCHES, post: 742043, member: 559036"] ok i'm alot rusty but i think u have 2 measure from the floor to the roof and then from door 2 door...and then from the rear deck to the dash board...u mutliply them...and the u divide by 1130..and then u divide by 2....(i think i'm not sure its been 10 years (15 years old) since i measured incar freq.) i.e. 2005 dodge quadcab ...floor to roof 40.4inches, door to door 66.9inches..from rear to front is 77.7inches..allthis adds up to 210004.452 cubic inches...then divide that number by 1130..and u will get 185.84..then divide that number by 4 and 46.46hz is your res. frequecy for that truck ... now let take a different truck 2005 cevy tahoe floor to roof is 39.1inches..from door to door is 64.9inches...from front to rear is 107.2inches..and this up and u get 272029.648 cubic inches..divide that number by 1130..and u get 240.73..divide that by 4 and u get 60hz so u see freq changes in different trucks 80 again these are not concreate freq...the measurements of the inside of both trucks are correct..i got them from the dealer...but as far as calculating the res freq..i'm not sure if i did it the right way...if i am right i'll be shocked as hell...but i dout if i am right [/QUOTE]
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