The power of sound

It is only a big concrete-mixer in front of the building that is being renovated across the street. No need to feel anxious. But it sounds similar to the noise of police helicopters circling around in the area close to my home whenever the Spanish government does something the people here don't support and they go out on the streets to let their voices be heard. Every time I get immersed in my work I forget it is only a concrete-mixer. And have to remind myself and look out of the window when I start feeling a bit nauseous again. Intruiging how you get conditioned so quickly and how the memory of sound makes your body respond before your mind realises what it is and changes how you feel about it.