4. It is perceived as how "long" or "short" a sound is.

1. It refers to how "low" or "high" a sound is.

2. It is perceived as how "loud" or "soft" a sound is.

8. It refers to an unwanted sound.

3. It refers to the quality of different sounds.

6. It is the combination of all sounds (whether audible to humans or not).

7. It relates to the number of sound sources and the interaction between them.

10. It is the component of the acoustic environment that can be perceived by humans.

13. It indicates how forceful the wave is.

15. How many hertz does the lowest A key on the piano have?

18. How many decibels does a rock concert can have?

11. It is about detecting danger. navigation, predation, and communication.

12. It is measured in the number of sound vibrations in one second.

17. How many hertz does the highest key on the piano have?

19. A normal speaking voice is around how many decibels?

19. How many decibels can permanently damage the ears?

9. It is defined as oscillation in pressure, stress, particle displacement, particle velocity, etc.

16. How many hertz does the middle C key on the piano have?

14. How many hertz of sound can a healthy ear hear?