Logarithms And Decibels

Question 1

The logarithm of a numeral is defined as how many times ___ must be multiplied together to get that numeral

Answer 1

10

Question 2

What is a decibel

Answer 2

A relationship between 2 numbers

Question 3

Decibel notation is a ___ between 2 numbers

Answer 3

Ratio

Question 4

What reports the relative strength of an us wave

Answer 4

Decibels key word: relative

Question 5

The scale associated with decibel notation is

Answer 5

Logarithmic

Question 6

What is the decibel representation when an acoustic signal is amplified “+ or -“

Answer 6

Positive

Question 7

What is the decibel notation for an acoustic signal that is attenuated “+ or -“

Answer 7

Negative

Question 8

The intensity of a signal declines from 1.5 mW/cm2 to 0.75 mW/cm2. How many decibels is this change in intensity

Answer 8

-3 db. Negative bc it declines and -3 bc it is half

Question 9

What it is describe attenuation

Answer 9

Decibels

Question 10

What does a 3 dB change in a value of intensity mean

Answer 10

The value has doubled

Question 11

The power in a wave is increased to 10 times its original value. How many decibels describe this change

Answer 11

10

Question 12

The intensity of an us wave is changed by -6 dB. This means that the current intensity is __ as much as it’s original level

Answer 12

1/4