In the shadow of the image for decades, audio is now experiencing a second youth. From virtual assistants to podcasts, through 100% voice social networks, some even speak of revolution.

It didn't take much to make us want to dive in head first, inspecting every intersection between sound waves and the outdoors.

With unstoppable logic, each article came to reveal the idea that underpinned the whole of this book: the era of audio will not live without the era of listening. From the planet, from others, from ourselves. What if it's time to open our ears wide?