There is no complete silence in nature–listening closely to silence, we come to hear a myriad of quiet sounds within the hearing range of the human ears which we are used to ignoring and taking for granted as absence of sound. Silence, thus, turns out to be the absence of both expected and unwanted sound frequencies, while we do not consider most of the nameless finer frequencies between and beyond these arbitrary sound-marks. Everything in nature produces frequencies within and/or beyond our hearing range.
The physical properties of sounds in nature can trigger our auditory nerves in myriad ways influencing our psychic states. Some frequencies are soothing while some others are disturbing. The sound of the drizzling rain has a different effect on us than the sound of the thunder rumbling or a cricket chirping.
The frequency of the cricket’s cry I recorded a couple of hours ago and am posting here has a tensing effect on us. In other words, this cricket gives you some tension. Play the track and feel it for yourself.