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Coding question for setup of Ultrasonic sensor (HC-SR04) and Buzzer - Arduino Uno

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I am relatively new to Arduino so I know the basics however I am not the best at coding. My problem is that I am not sure about the coding for the following setup: I am using a Ultrasonic Sensor (HC-SR04) and a piezo buzzer. I want to be able to move my hand towards the sensor and away from the sensor and in doing this the buzzer will produce notes which will increase and decrease in pitch relative to my hand movement. (e.g. when my hand moves closer to the sensor the notes rise in pitch and when my hand moves away the notes decrease in pitch) I would greatly appreciate any feedback or help as I am quite stuck and it is for a college project!

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         You only need to supply a short 10uS pulse to the trigger input to start the ranging, and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo.You can calculate the range through the time interval between sending trigger signal and receiving echo signal. the range = high level time * velocity (340M/S) / 2; I suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.Then you could calculate the distance, because you have the pulse width by using

    Formula:   Distance_CM= ((Duration of high level)*(Sonic :340m/s))/2.

    That's the gist to start. Please mark correct if this gets you going.

    Clem

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         You only need to supply a short 10uS pulse to the trigger input to start the ranging, and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo.You can calculate the range through the time interval between sending trigger signal and receiving echo signal. the range = high level time * velocity (340M/S) / 2; I suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.Then you could calculate the distance, because you have the pulse width by using

    Formula:   Distance_CM= ((Duration of high level)*(Sonic :340m/s))/2.

    That's the gist to start. Please mark correct if this gets you going.

    Clem

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