[Harp-L] re: Cover Material and shape

[Jonathan Ross <jross38@xxxxxxxxxxx>]

Joseph Bernard wrote:

"I just took the carpet out of my son´s room and put in a marble  
floor.  I´m rather certain that the sound is different, even if he is  
playing the same Hertz.  "


The difference is dramatic between a room with resonant acoustics  
(hard surfaces and a decent size) and those with soft, absorbent  
materials.  I deal with this quite often in my work.  However,  
consider the question of scale: floors, walls and ceilings are a huge  
surface area, even a 10' x 10' floor is a 100 square feet of surface  
area.  The harmonica cover is tiny.  If we assume one by four inches  
for the average diatonic (being extremely generous and too lazy to  
measure), that's 4 square inches per cover, 8 square inches overall  
for a grand total of 2/3 of a square foot surface area.  Chromatics,  
especially 64s are a bit bigger, maybe even reaching a foot of  
surface area.  But, the scales are so massively different that what  
is a significant effect on one end is an insignificant one on the other.





 ()()    JR "Bulldogge" Ross
()  ()
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