The noise starts with a noise repeated a few times, separated each time by only a few milliseconds. After a few repetitions of this noise, its becomes constant. It is a very rough and phat sound, and is generally a low pitched noise with a general undertone sustained through the entire time the sound lasts for. There is a rumbling tone over the drone. It is also rough, unlike the drone, and is a higher pitch as well.
After a few seconds a high pitched noise is heard. It is short and sharp. Soon after this sound occurs, another noise begins, a short and sharp click. It comes from in front of me. The noise is lots of individual sounds, lasting less than a second each. It is a mid-pitch sound, and has no distinct tonal quality.
After many minutes of the sound lasting, it stops suddenly, leaving a silence and a slight reverb behind it. The clicking noise can be heard, very faintly. As I move away from the source of the noise, it becomes fainter and fainter, until it can no longer be heard.