Voice of nature

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Across
  1. 2. :to make a continuous low sound:
  2. 4. :causing sounds to be clear and loud
  3. 7. :a pleasant musical sound made by different notes being playedor sung at the same tim
  4. 8. a feeling of great respect sometimes mixed with fear or surprise
  5. 9. to speak very quietly, using the breath but not the voice
Down
  1. 1. :the quality of being peaceful and calm
  2. 2. : to make a long, loud, deep sound
  3. 3. the way people or animals naturally react or behave, without having to think or learn about it
  4. 5. a strong pattern of sounds, words, or musical notes that is used in music
  5. 6. :basic and relating to an early stage of development