Open Access
Table 2
Experimental setup equipment list.
| Equipment | Model |
|---|---|
| Microphone type | PCB 130D20 |
| IEPE signal conditioner | MMF M31 |
| FPGA controller | Speedgoat IO334 |
| Frequency analyser | Brüel & Kjær type 3160 |
| Power amplifier | Brüel & Kjær type 2706 |
| Waveguide dimensions | Δx: 100 mm, x1: 420 mm |
| L: 970 mm, ∅: 72 mm |
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