it is one hz off, low. 439hz.
I have never heard of a person who can detect lower than 20 hz. In fact, most physics books actually say the range of hearing starts at 20hz.
Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440Hz. A second player sounds the same note and hears that her flute is slightly "flat" (that is, at too low of a frequency). Playing at the same time as the first flute, she hears one loud-soft-loud beat per second.
What is the frequency of her instrument?
I have no clue how to do this, my final is tomorrow. Please help!
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