My company measures sound power to BS EN ISO 3744 within this standard the Directivity index is calculated and has a limit on each microphone position of <5dBA.
Can any one tell me if directivity index should be an absolute value when checking this ? Below are some figures that have recently been calculated.
Can any one tell me if directivity index should be an absolute value when checking this ? Below are some figures that have recently been calculated.
| Microphone | Directivity Index dBA | |
| Pos1 | 3.27079601 | |
| Pos2 | -1.217054 | |
| Pos3 | -0.789604 | |
| Pos4 | 3.19929601 | |
| Pos5 | -1.035804 | |
| Pos6 | -5.3396492 | |
| Pos7 | -3.6387963 | |
| Pos8 | 0.29374601 | |
| Pos9 | -2.109904 |
