Question

Science Grade 8

Does anyone know this answer to this Science question?

Select the sentence that is true about how a person changes the pitch of sounds when singing.

A person stretches the vocal cords to produce higher-frequency sound waves.
A person stretches the vocal cords to produce lower-frequency sound waves.
A person relaxes the vocal cords to produce higher-frequency sound waves.
A person relaxes the vocal cords to produce lower-frequency sound waves.

Answer 1

Sound waves are produced by air flow coming from our lungs passing through our throat, more specifically our larynx and moving with two folds of tissue called vocal chords. The sound is made by the vibration of vocal chords, so the more stretched the chords are over the larynx, their frequency of vibration is higher, therefore producing higher-pitched sounds.

real answer:

#vocal cords

Step-by-step explanation:

hope this helps

Answer 2

Sound waves are produced by air flow coming from our lungs passing through our throat, more specifically our larynx and moving with two folds of tissue called vocal chords. The sound is made by the vibration of vocal chords, so the more stretched the chords are over the larynx, their frequency of vibration is higher, therefore producing higher-pitched sounds.