Hello. This question is incomplete. The full question is:
What is the central idea of "Psst ... Hey, You" that is supported by the other articles? Sound technology continues to evolve. Modern inventors must compete for recognition. Directional speakers are useful in commercial business. Advances in technology are prohibitively expensive.
Answer:
Sound technology continues to evolve.
Step-by-step explanation:
In "Psst ... Hey, You" we can see how music can be a factor in advancing technology and science as a whole. That's because within the article, we can read several situations where sound technology can interfere in different situations, from advertisements to technological equipment used in wars.
Sound technology is in a constant process of evolution, and each evolution allows a great scientific advance that can have several consequences in our lives.