Depending on the emitted tones, volume and the rhythm of the sound, the plants react geometrically in their structure and by moving their parts. We can assume this reaction as kind of communication, because if we understand how the sound influence them this is a two-way communication. The same case is when we talk to the plants and they react on the meaning (positive or negative) of our speech.
I don't know how do you communicate with the animals, so I can't answer you on the second part of your question. Good luck!
In addition to my previous suggestion, you may also try to find some interesting books on Animal Signal and Communications published by Springer-Verlag Berlin Heidelberg. Hope you could find some valuable acoustical analysis perspectives for your purposes. Attached also the link to a paper by Gagliano et al. on plant bioacoustics.