| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| matryoshka locally resonant sonic crystal | 1.74 | 0.9 | 8058 | 99 | 41 |
| matryoshka | 1.79 | 1 | 6871 | 74 | 10 |
| locally | 1.55 | 1 | 4725 | 73 | 7 |
| resonant | 1.64 | 0.2 | 7633 | 79 | 8 |
| sonic | 0.19 | 1 | 8659 | 27 | 5 |
| crystal | 1.17 | 0.8 | 6370 | 86 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| matryoshka locally resonant sonic crystal | 0.95 | 0.9 | 3291 | 87 |
