The lady understood that Tenaliraman deciphered the secret of invisible weaving. 
ðʌ leɪdi ʌndɜ˞stʊd ðæt  dɪsaɪfɜ˞d ðʌ sikɹʌt ʌv ɪnvɪzʌbʌl wivɪŋ. 
 Indian's voice is very clear in this recording, with a very monotone tone. The speaker delivers words at a moderate pace, and the sound is slightly close to the microphone.