The sound of silence

As Delhi-NCR emerges from the Diwali cacophony - the non-stop crackle of firecrackers serves as a noisy reminder that our ears never get a break - this episode of CNN's Chasing Life couldn't feel more timely. Dr Sanjay Gupta sits down with Northwestern neurobiologist Nina Kraus in The Power of Sound to explore how our brains make sense of soundscapes around us.

Moving far beyond simple hearing, Kraus explains that processing sound is one of the brain's most demanding tasks. It operates as an active feedback loop shaped by our memories, habits and past experiences.

The episode introduces the concept of a unique 'sonic fingerprint' - even showing what individual brainwaves sound like when processing music - and compares our neural processing to an audio mixing board that balances pitch, rhythm and timbre.


The discussion hits home when contrasting unnecessary urban noise - which acts as a constant, hidden stressor - with intentional sound inputs like music or multi-language learning that strengthen neural connections.

Warm, accessible and practical, Gupta's conversation urges us to actively curate our daily auditory environments and trim out meaningless digital noise.

Using a purely audio medium to unpack the science of sound makes for a refreshing, thought-provoking listen - one that might prompt you to seek out a little extra quiet today.