Airborne ultrasound technology detects packaging seal defects by transmitting ultrasonic sound waves through the seal area. Variations in the reflected signal indicate problems such as weak seals, channel leaks, or incomplete bonding. Because the technology operates without direct contact, it can inspect packages quickly and without damaging them. This makes airborne ultrasound suitable for both inline and offline inspection of flexible packaging materials. The technology is widely used in medical device and pharmaceutical packaging environments where reliable seal integrity is essential.