Floral tributes outside French Embassy in Dublin for victims of Paris Terror Attacks

The transcript contains a brief discussion about the sound, indicating it is quite noticeable.

What is the primary focus of the introduction section?

• The history of sound

• The impact of sound levels

• The physics of sound waves

• The biology of hearing

How is sound intensity perceived by humans?

• As a change in temperature

• As a variation in loudness

• As a tactile sensation

• As a visual signal