Understanding Harmonic Scales and Instrument Operation

What is the function of the flexible tube with open ends?

• It acts as a container for liquids.

• It serves as a decorative item.

• It is used for measuring air pressure.

• It operates like an instrument by creating air excitation.

How does the pitch of the instrument change?

• It fluctuates randomly with air flow speed.

• It remains constant regardless of air flow speed.

• It decreases as the air flow speed increases.

• It increases as the air flow speed increases.

What is the similarity between the flexible tube instrument and a bugle?

• Both are made of metal.

• Both are used in orchestras.

• Both can play any song without valves or keys.

• Both have valves and keys.