Numbers of dropped, combined, and new or unrecognizable syllables for the six experimental birds over the entire recording period
| Recording time | No. of syllables dropped | No. of syllable combinations | No. of combinations | No. of new syllables | No. of new occurrences |
|---|---|---|---|---|---|
| Preop month 1 | 0 | 1 | 2 | 0 | 0 |
| Preop month 2 | 0 | 0 | 0 | 0 | 0 |
| Preop month 3 | 0 | 0 | 0 | 0 | 0 |
| Deaf—week 1 | 2 | 6 | 25 | 9 | 21 |
| Deaf—week 2 | 3 | 7 | 32 | 11 | 45 |
| Deaf—week 3 | 3 | 6 | 18 | 17 | 61 |
| Deaf—week 6 | 7 | 7 | 30 | 12 | 103 |
| Deaf—week 12 | 7 | 6 | 19 | 14 | 80 |
Numbers of dropped, combined, and new or unrecognizable syllables were counted for song bouts recorded during three preoperative (preop) months and 1, 2, 3, 6, and 12 weeks after deafening. Number of syllable combinations refers to the overall number of types of combinations. Number of combinations refers to the number of times a combination of any type occurred. Number of new syllables refers to the number of new syllable types. Number of new occurrences refers to the number of times any new syllable occurred.