When 90dB is LOUDER than 120dB

The video explains that decibels measure the intensity of sound waves but not loudness. Loudness is influenced by frequency and human ear sensitivity, which varies across different frequencies. Decibels are used as a practical approximation for loudness in everyday situations, but they don't accurately measure loudness for all frequencies.

What do decibels actually measure in a sound wave?

• The speed of the sound wave

• The height of the sound wave

• The frequency of the sound wave

• The duration of the sound wave

Why might a sound with fewer decibels be perceived as louder?

• Because it is a continuous sound

• Because it has a higher frequency

• Because it has a lower frequency

• Because it is closer to the listener

Which part of the ear is responsible for detecting different sound frequencies?

• The hair cells

• The cochlea

• The auditory nerve

• The eardrum

Why are humans less sensitive to very high and very low frequencies?

• Because the hair cells for these frequencies are less effective

• Because they are outside the range of human hearing

• Because they are too quiet to detect

• Because they are absorbed by the environment

Why are decibels still used to approximate loudness despite not measuring it directly?

• Because they are a standard unit of measurement

• Because they are used in all sound-related fields

• Because they are easy to calculate

• Because they approximate loudness well for sounds we can hear