आटोफ़ोनोस्कोप
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atofonoskop - yah ek yantr hai jisaki rachana paiankonaseli ne ki thi. svarayantr ke adhyayan ke lie is yantr se sahayata milati hai.[1]
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tika tippani aur sandarbh
- ↑ hindi vishvakosh, khand 1 |prakashak: nagari pracharini sabha, varanasi |sankalan: bharat diskavari pustakalay |prishth sankhya: 361 |