For safe listening, limit listening to a portable music player with earphones or earbuds at ___

Author Question: For safe listening, limit listening to a portable music player with earphones or earbuds at ____ ... (Read 69 times)

serike

Hero Member
Posts: 542

on: Jul 12, 2018

For safe listening, limit listening to a portable music player with earphones or earbuds at ____ percent of its potential volume to ____ hour(s) a day.
A) 30; three
B) 50; two
C) 60; one
D) 70; two
E) 80; three

Question 2

What is the lowest frequency that the human ear can consciously detect?
A) 50 hertz
B) 500 hertz
C) 4,000 hertz
D) 10,000 hertz
E) 20,000 hertz

BAOCHAU2803

Sr. Member
Posts: 316

Reply #1 on: Jul 12, 2018

Answer to Question 1

C

Answer to Question 2

A

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