Final answer:
Outside noise refers to disruptive background sounds such as cell phone rings or gum chewing, which can significantly interfere with our ability to hear primary sounds, especially in noisy environments like crowded roadways.
Step-by-step explanation:
An example of outside noise includes situations where a cell phone going off, pen clicking, gum chewing, and similar background sounds interfere with the ability to hear more primary sounds. This concept is pertinent when discussing how sound intensity and loudness are related to the vibrations of the sound source.
For instance, noise on crowded roadways like in Delhi illustrated can be so intense that it is hard to hear someone speaking unless they shout. High noise levels can be hazardous to hearing and can lead to hearing loss, especially for those frequently exposed to such environments, like musicians.
It is important to understand these acoustic concepts to protect one's hearing and manage one's environment effectively whether by using headphones with noise cancellation features or by choosing quieter places for tasks requiring concentration.