→ See also Mechel, Vol. I, Ch. 12 (1989)
In contrast to the previous → Sect. B.19 the grooves are no longer narrow; higher modes may exist in them.
The ground of the grooves is supposed to be terminated with an admittance G\({}_{{s}}\) (e.g. produced by a porous layer there).
Where possible, the relations are taken from the previous → Sect. B.19 .
The grooves are numbered \(\nu\)= 0,\(\pm\)1,\(\pm\)2,… and a co-ordinate z\({}_{{\nu}}\)= z–\(\nu\) \(\cdot\)T is used in the \(\nu\)th groove with –a/2 \(\leq\)z\({}_{{\nu}}\) \(\leq\) +a/2. The field in the groove is formulated as
with
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(2008). Plane Wall with Wide Grooves. In: Mechel, F.P. (eds) Formulas of Acoustics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-76833-3_38
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