audio illusion: missing fundamental | Desmos

Expression 3: 3 Start sum from "i" equals 2 to 10, end sum, StartFraction, 1 Over "i" squared , EndFraction sine left parenthesis, 2 pi "i" "x" plus "h" left parenthesis, "i" , right parenthesis , right parenthesis negative 3

3

Expression 4: Start sum from "i" equals 1 to 10, end sum, StartFraction, 1 Over "i" squared , EndFraction sine left parenthesis, 4 pi "i" "x" plus "h" left parenthesis, "i" , right parenthesis , right parenthesis minus 6

4

Expression 5: "h" left parenthesis, "x" , right parenthesis equals 2 pi mod left parenthesis, 10 to the 4th power sin left parenthesis, 10 to the 4th power "x" plus "T" , right parenthesis , 1 , right parenthesis

5

Expression 6: "T" equals 0.4 8 6

0

1

6

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