art
Sine Wave A 440 Hz Concert Pitch for Ten Hours
Stop your brain from overthinking. You don't need an app. Ten hour Sine wave with no overtones which is called pure as it is only the fundamental frequency.
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Andy Goldsworthy is an English sculptor, photographer, and environmentalist who produces site-specific sculptures and land art situated in natural and urban settings. Earth Wall pays homage to the rich archaeological setting of the Presidio Officers’ Club. It was built with materials taken from the site—earth from the Officers’ Club rehabilitation and eucalyptus branches from the Presidio forest. It is located behind the Hardie Courtyard.