Table 2 Microphone and loudspeaker labels

Microphones

Dummy head

DHL

Left ear

DHR

Right ear

BTE pieces

BTELF

Left ear, front

BTELB

Left ear, back

BTERF

Right ear, front

BTERB

Right ear, back

External microphone

XM[i]

With index [i] as depicted in Fig. 3

[i] \(\in\) {1, 2, ..., 5}

Circular microphone array

CMA[r]_[a]

At [r] cm radius and an angle of [a]\(^\circ\)as depicted in Fig. 4

[r] \(\in\) {10, 20}

[a] \(\in\) {−135, −90, ..., 180}

Loudspeakers

SAL

S[a]_[d]

At angle of [a]\(^\circ\)and in [d] m distance as depicted in Fig. 3

[a] \(\in\) {−90, −60, −45, −30, 0, 30, 45, 60, 90}

[d] \(\in\) {1, 2}

AIL

S[l][i]

At height level [l] with index [i] as depicted in Fig. 5

[l] \(\in\) {L, U, T} (indicating lower, upper, and top level)

[i] \(\in\) {1, 2, ..., 12}