04/06/21 - Second test

More experiments

Tomato plant had grown a lot since our last visit (almost the double of its size). We decided to experiment only with sound and voice today and do not expose the plant to other stimuli like water or touches. Therefore we used the Ryerson Audio-Visual Database of Emotional Speech and Song (RAVDESS). As plants in another project showed a big response to sinuswaves of 200 Hz frequency, we decided to also compare human voice to this created sinuswave. We carried out 5 experiments:

1. No stimulus
2. 200 Hz - 100 amplitude
3. 200 Hz - 200 amplitude
4. RAVDESS database – actor 7 male
5. RAVDESS database – actor 8 female

Documentation

We documented the following factors:

• Weather
• Sunlight
• Air humidity
• Time
• Plant height

Tests

Nr.	Time	Length	Temperatur	Humidity	Weather	Note	Stimuli	Data
01	11:25	45 min	28,2 Grad	65 %	Cloudy	No direct sunlight	None	[Download]
02	12:55	49 min	26,3 Grad	58 %	Sunny	No direct sunlight	200HzAmp100	[Download]
03	13:55	33 min	27,8 Grad	60 %	Sunny	No direct sunlight	200HzAmp200	[Download]
04	15:03	31 min	27,9 Grad	59 %	Sunny	No direct sunlight	Male voice	[Download]
05	15:40		28,8 Grad	59 %	Sunny	No direct sunlight	Female voice	[Download]

Played stimuli files

Nr.	Audiofile	Note
02	[Download]	200 Hz Sinuswave Amp 100 / Python created
03	[Download]	200 Hz Sinuswave Amp 200 / Python created
04	Link	RAVEDESS Database - Actor 7 in a loop
05	Link	RAVEDESS Database - Actor 8 in a loop

Results