Research Article
Modal Analysis of 27 mm Piezo Electric Plate for Small-Scale Underwater Sonar-Based Navigation
Table 1
Sonar frequency and its range.
| Frequency (kHz) | Range (m) |
| Low frequency (LF) 8–16 | >10000 | Medium frequency (MF) 18–36 | 2000–3000 | High frequency (HF) 30–60 | 1500 | Extra high frequency (EHF) 50–110 | <1000 | Very high frequency (VHF) 200–300 | <100 |
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Sources: [10–13].
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