Devotee: You said Prahlāda Mahārāja, he heard Nārada Muni speaking in the womb . . . (indistinct) . . . hear you speaking?
Prabhupāda: Certainly. (laughter)
Prabhupāda: Why not Haimāvatī's child? Even a lizard is here in this room, he is also hearing. This is transcendental sound. Just like there was a sound, everyone's attention was diverted there. So sound is so penetrating. Sound is the origin of creation. So this is transcendental sound. It penetrates everyone's heart. Because everyone is spiritual being. That is the specific significance of sound vibration.
It is said in the Śrīmad-Bhāgavatam, ahaituky apratihatā (SB 1.2.6).
This spiritual cultivation cannot be checked by any material impediment. Because the child is packed within the womb, within the belly, under the shackles of intestines and so miserable condition . . . in the belly or the abdomen of the mother, the child remains in a very miserable condition. Because the consciousness is not developed.
But as soon as the consciousness is developed at the age of seven months, the child wants to come out. Therefore it moves. If it is male child, then it moves toward the right side. If it is female child, then it moves to the left side. So these are description in the Śrīmad-Bhāgavatam. So by the movement of the child you can understand whether it is male or female.
So this transcendental sound is not checked by any material condition. Therefore it reaches. Therefore it is confirmed in the Bhagavad-gītā that śucīnāṁ śrīmatāṁ gehe yoga-bhraṣṭo'bhijāyate (BG 6.41).