Youtube comprehention video 8

What is the video about?

• How companies adjust thei headphones to avoid hearloss

• Answering the question of wether headphones destroy hearing

• The anatomy of the human ear

• How does the ear restores from noise damage

What are these called ?

• micro bone nails

• nerves

• eart hairs

• hair cells

Chose the image with healthy hair cells.

• 
• 

" If the hair cells are exposed to loud noise for long enough, the hair cells are temporarly damaged"

• TRUE✔️

• FALSE❌

Permanent hearing damage is caused by _____ and ______.

• frequency

• duration

• type of sound

• loudness

How many dB does the US Department of labor recommend over an 8 hours work period?

• 115

• 10

• 85

• 90

when the headphone is listening to the enviroment sound and produces an anti-wave frequency, it is called ________.

• passive noise cancellation

• active noise cancellation

" Althogh in active noise cancellation, headphones are producing an antiwave, the haircells are not exposed to any silent noise"

• TRUE✔️

• FALSE❌

Choose the enviroments where headphone noise cacelling doesnt work. (2 correct answers)

• 
• 
• 
• 

Dr. Amy Sarow: "Noise damage is _______. So it's up to us to be thinking about it, and be mindful about it."

• harmless

• visible

• invisible

• rare