A recent study published in the journal Cell has revealed that thirsty or stressed plants emit ultrasonic sounds that are inaudible to the human ear.
Scientists from Tel Aviv University recorded these sounds using specialized microphones placed in a soundproof box and a greenhouse, where they studied tomato and tobacco plants.
The researchers developed machine learning models to analyze the sounds and identify the plants’ conditions, such as dehydration or disease.
The study coauthor, Lilach Hadany, explained that previous studies had shown that vibrometers attached to plants could record vibrations, but it remained unclear whether these vibrations could become airborne soundwaves. The new research aims to settle this debate, which has been ongoing for many years.
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