MY VOCAB PRACTICE:

1. Unison.
   At basic training trainees are thought by drill sergeants to march and call cadence in unison in the parade field ceremony.

2. Sonorous
   The boss electronic music systems are designed with impressive sonorous sound to attract high-end customers.

3. Sonic boom.
   Sometimes it can be shocking to hear a sonic boom when you’re jogging on a trail somewhere isolated.

4. Dissonance.
   Five things a guitarist can do to eliminate dissonance sounds from a guitar are: positioning the amp correctly, understanding equalization, using pedal effects, use better speakers, and use short cables.