QuestionMay 12, 2025

13) Which statements below are TRUE about beats? CHECK ALL THAT APPLY. piano tuners use beats to tune pianos they are repeated changes in loudness the two sounds must be close in frequency the two sound waves interfere constructively at regular intervals the two sound waves interfere destructively at regular intervals two notes are in tune if no beat can be heard when they are played together

13) Which statements below are TRUE about beats? CHECK ALL THAT APPLY. piano tuners use beats to tune pianos they are repeated changes in loudness the two sounds must be close in frequency the two sound waves interfere constructively at regular intervals the two sound waves interfere destructively at regular intervals two notes are in tune if no beat can be heard when they are played together
13) Which statements below are TRUE about beats? CHECK ALL THAT APPLY. piano tuners use beats to tune pianos they are repeated changes in loudness the two sounds must be close in frequency the two sound waves interfere constructively at regular intervals the two sound waves interfere destructively at regular intervals two notes are in tune if no beat can be heard when they are played together

Solution
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Answer

All statements are true. Explanation 1. Identify True Statements Analyze each statement based on the concept of beats in sound waves. 1. **Piano tuners use beats to tune pianos**: True. Piano tuners listen for beats to adjust the frequency until no beats are heard, indicating the notes are in tune. 2. **They are repeated changes in loudness**: True. Beats result from interference patterns causing variations in amplitude, perceived as changes in loudness. 3. **The two sounds must be close in frequency**: True. Beats occur when frequencies are close but not identical. 4. **The two sound waves interfere constructively at regular intervals**: True. Constructive interference occurs at certain points, contributing to the beat pattern. 5. **The two sound waves interfere destructively at regular intervals**: True. Destructive interference also occurs, leading to the alternating loud and soft pattern of beats. 6. **Two notes are in tune if no beat can be heard when they are played together**: True. No beats indicate that the frequencies are matched, meaning the notes are in tune.

Explanation

1. Identify True Statements<br /> Analyze each statement based on the concept of beats in sound waves.<br /><br />1. **Piano tuners use beats to tune pianos**: True. Piano tuners listen for beats to adjust the frequency until no beats are heard, indicating the notes are in tune.<br />2. **They are repeated changes in loudness**: True. Beats result from interference patterns causing variations in amplitude, perceived as changes in loudness.<br />3. **The two sounds must be close in frequency**: True. Beats occur when frequencies are close but not identical.<br />4. **The two sound waves interfere constructively at regular intervals**: True. Constructive interference occurs at certain points, contributing to the beat pattern.<br />5. **The two sound waves interfere destructively at regular intervals**: True. Destructive interference also occurs, leading to the alternating loud and soft pattern of beats.<br />6. **Two notes are in tune if no beat can be heard when they are played together**: True. No beats indicate that the frequencies are matched, meaning the notes are in tune.
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