30 



AKT. 10. — T. TERADA. 



Within the compass of the fundamental notes of the syahu- 

 hati, the correction due to the lateral openings, is represented 

 nearly by 



d 



a =,/(.)(4+.), 



where c is constant and /(r) is a function of tlie radius r of the 

 lateral openings. From the curve I in Fig. 7 for which the 

 ratio -jr is e(i[ual to that in the ><.yahuhati, 



a = 1-2.8 X ("4- + 0.047^ cm. 



Again from Fig. o, the correction due to the embouchure 



is given by 



«' = A - m(7i- »o) = 10.8 - -r^(» - '-^ÖO) 



27-2 Z- 



now, 



^_/4-« + ^'^/+yi(,)(^_l.+ ,^4-7;_ ^ 



/-- •2[/4- (/(>•) + ny- ■2[/(ry/~l-]^0 



>-i'^^:*'f<^-)){^u/^[mM^} 



In tlic syakuhatl, 



/ = (/+ 1.3.4) 



i;' /, .o"357-12.8/' 



(/+13.4f J 



