How do you define loudness, pitch, and timbre? Name one potential perceptual effect each of the above can create in a film.

The
pitch of a sound is a quality which tells us how high or how low a
sound is; in other words, pitch relates to the frequency of sound vibrations. Thus, a high pitch
sound correlates with a high frequency sound wave, and a low pitch sound correlates with a low
frequency sound wave. In films, the pitch of a sound helps us differentiate the music and the
speech from the other sounds in the film.

Loudness (volume) is a quality which determines the
magnitude of sound. In other words, it tells us how loud or how soft a sound can be. In films,
loudness is constantly used to set the scene. For instance, a scene which is set in an office
building would have a lot of loud background noises like paper rustling, shoes clacking, or
printers printing out paper; however, when two people have a conversation, the background noise
is reduced and the loudness of the actors' voices is amplified, so that we can focus on their
dialogue.

Timbre (tone quality) is, essentially,
the quality of a sound, which helps us differentiate sounds that have the same pitch or
loudness. Filmmakers often use timbre to help the audience recognize familiar sounds, as well as
accentuate the soundtrack of the film, as timbre helps us distinguish the various musical
instruments.