Question
What is the purpose of a telephone slide tone?
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A slide tone (also known as a call progress tone) is an audible signal that users hear when making telephone calls. Show more…
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Touch-Tone Phones On a Touch-Tone phone, each button produces a unique sound. The sound produced is the sum of two tones, given by $y=\sin (2 \pi l t) \quad$ and $\quad y=\sin (2 \pi h t)$ where $l$ and $h$ are the low and high frequencies (cycles per second) shown in the illustration. For example, if you touch 7 , the low frequency is $l=852$ cycles per second and the high frequency is $h=1209$ cycles per second. The sound emitted by touching 7 is $y=\sin [2 \pi(852) t]+\sin [2 \pi(1209) t]$ (GRAPH NOT COPY)
Applications of Trigonometric Functions
Simple Harmonic Motion; Damped Motion; Combining Waves
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