How Loud Am I?

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Across
  1. 3. Symphony orchestra
  2. 4. Snowmobile
  3. 5. Lawn mower
  4. 6. Inside subway car
  5. 8. Computer
  6. 9. Rock concert, fireworks, thunderclap
  7. 11. Shower, dishwasher
  8. 13. Garbage truck
Down
  1. 1. Rocket launch
  2. 2. Toilet flushing
  3. 4. Sound waves turn into shock waves
  4. 7. Mosquito
  5. 10. A pin dropping
  6. 11. Normal conversation
  7. 12. Loudest recommended sound with hearing protection
  8. 14. Alarm clock