Understanding Sound Waves

Have you ever wondered how we can hear music from a speaker or a friend's voice from across the room?

• Sound is produced by light waves traveling through space.
• Voices are transmitted through electrical signals.
• We hear music through vibrations in the ground.
• We hear music and voices through sound waves traveling through the air.

Describe how is sound produced

• Sound is created by the movement of light particles.
• Sound is produced by static objects that absorb sound waves.
• Sound is generated by chemical reactions in the air.
• Sound is produced by vibrating objects that create pressure waves in a medium.

Explain how sound travels as longitudinal waves

• Sound travels as longitudinal waves by creating compressions and rarefactions in a medium.
• Sound is a form of electromagnetic radiation.
• Sound travels through a vacuum without any medium.
• Sound travels as transverse waves with peaks and troughs.

Differentiate frequencies and amplitudes

• Frequencies are the number of cycles per second, while amplitudes are the height or strength of the wave.
• Frequencies are related to color, while amplitudes are related to temperature.
• Frequencies measure the loudness of a sound, while amplitudes measure the pitch.
• Frequencies are the strength of the wave, while amplitudes are the number of cycles per minute.

Explore human and animal hearing ranges

• Humans: 20 Hz - 20 kHz; Dogs: 40 Hz - 60 kHz; Cats: 48 Hz - 85 kHz.
• Humans: 5 Hz - 18 kHz; Dogs: 60 Hz - 70 kHz; Cats: 45 Hz - 80 kHz.
• Humans: 15 Hz - 25 kHz; Dogs: 20 Hz - 40 kHz; Cats: 50 Hz - 90 kHz.
• Humans: 10 Hz - 15 kHz; Dogs: 30 Hz - 50 kHz; Cats: 40 Hz - 70 kHz.

How is the sound produced?

• Sound is produced by vibrating objects.
• Sound is produced by non-vibrating liquids.
• Sound is produced by still air.
• Sound is produced by silent objects.

How do sounds travel?

• Sounds travel as light waves in a vacuum.
• Sounds travel as vibrations through a medium.
• Sounds travel as solid objects moving through air.
• Sounds travel as electrical signals through wires.

What is the auditory range?

• 20 Hz to 20 kHz
• 5 Hz to 50 kHz
• 30 Hz to 25 kHz
• 10 Hz to 15 kHz

Humans can hear sound frequencies ranging from 20 Hz to 20,000 Hz, while some animals can hear frequencies beyond this range.

• True

• False

The lower the sound frequency, the lower the pitch.

• True

• False