Touch-tone keypads have the following simultaneous low and
Chapter 7, Problem 49(choose chapter or problem)
Touch-tone keypads have the following simultaneous low and high frequencies:The signal given when a key is pressed is where is the low frequency and is the high frequency. 49. Touch-Tone Dialing.What is the mathematical function that models the sound of dialing 4? 50. Touch-Tone Dialing.What is the mathematical function that models the sound of dialing 3?
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