Stressed out plants emit sounds

Aviv University conducted a study to determine if plants make noise when stressed. The research focused on tomato and tobacco plants, which were divided into three groups: drought-stressed, cut at the stem, and control. These plants were placed in an acoustic box and recorded for an hour. Results showed that stressed plants emitted more ultrasonic sounds than control plants. A greenhouse experiment confirmed these findings, and machine learning classifiers could distinguish the noises produced by different plants.

What was the primary focus of the study conducted by Aviv University?

• The effect of sunlight on plant growth

• The role of fertilizers in plant development

• The impact of soil quality on plant health

• The noise emission of plants under stress

How many ultrasonic sounds per hour did drought-stressed tomato plants emit on average?

• 25

• 15

• 11

• 35

What was the average sound emission of control plants per hour?

• Twenty

• Ten

• Five

• Less than one

What did the greenhouse experiment confirm about plant sound emission?

• Plants emit sounds only in the acoustic box

• Plants emit more sounds when dehydrated

• Plants do not emit any sounds

• Plants emit more sounds when hydrated

What tool was used to distinguish the noises produced by different plants?

• Human listeners

• Machine learning classifiers

• Acoustic sensors

• Sound amplifiers