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13. As the frequency goes higher than 6 KHz, what must happen in order for the
person to hear the sounds? *
1 The person needs to focus more and pay better attention to the test.
O
There does not need to be any changes to the sound for the person to hear those
frequencies.
O The amplitude (or volume) must be increased.
O The amplitude (or volume) must be decreased.
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13. As the frequency goes higher than 6 KHz, what must happen in order for the
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