Natural sounds relax humans physiologically more than human sounds do.

Evidence

It is well known that water and bird songs are sounds that produce relaxation in humans more than do human sounds, as has been proved physiologically by measuring heart rate, skin conductance, and electromyographic responses. The sound of the human voice increases the relationship with natural sound but the combination of the human voice and technological sounds is widely rejected. — Almo Farina, Soundscape Ecology, 1093

Categorization

• XREF: connects to: Bird song masks noise better than water by adding meaning, not just energy — Almo Farina, Soundscape Ecology: Principles,…, 2408; Any sound can serve as a cue to deepen relaxation or energize the body — Pauline Oliveros, Deep Listening, 302; Human hearing evolved to decode natural sounds beyond speech or music — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 23 (+1 more)

Broader Connections

• Any sound can serve as a cue to deepen relaxation or energize the body #expands (0.80) — Pauline Oliveros, Deep Listening, 302
• Human hearing evolved to decode natural sounds beyond speech or music #complicates (0.75) — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 23
• Music alone can harmonize the inner world with the outer soundscape #complicates (0.75)