Table 1.

Description of the configuration setup.

Configuration	Location of Microphone and the Loudspeaker	Configuration	Location of Microphone and the Loudspeaker
C1	Loudspeaker and Microphone “co-located” at P.	C6	C1 with a hollow cylindrical foam
C2	Loudspeaker at P, Microphone at Q.	C7	C2 with a hollow cylindrical foam
C3	Loudspeaker at Q, Microphone at P.	C8	C3 with a hollow cylindrical foam
C4	Loudspeaker at R, Microphone at S.	C9	C4 with foam filling in the space between transducers and flange
C5	Loudspeaker at R, Microphone at Q.	C10	C5 with foam filling in the space between transducers and flange