Did some searching. The paper from 2019 that discussed this -
We recorded 65 dBSPL (dB of sound pressure level) ultrasonic sounds 4 inches (10 cm) from tomato and tobacco plants, implying that these sounds could be detected by some organisms from up to several feet (meters) away.
Did some searching. The paper from 2019 that discussed this -
https://www.sci.news/biology/plants-ultrasonic-clicks-07895.html