noun
blowing in; draft
Refers to wind, air, or sound blowing into a space. Often used for natural ventilation or unwanted drafts.
窓を開けると、涼しい風の吹き込みがあった。
When I opened the window, there was a cool breeze blowing in.
ラジオの吹き込みは明日の午後から始まる。
The radio recording starts tomorrow afternoon.
録音 is the general term for sound recording, while 吹き込み specifically implies a performance or broadcast recording session, often with a nuance of 'blowing in' one's voice or music.
Compound of 吹き (fuki, continuative form of 吹く 'to blow') + 込み (komi, continuative form of 込む 'to go in'). Literally 'blowing in', extended to audio recording from the idea of 'blowing' sound into a device.