LEGO 【MINDSTORMS】EV3
NXT Sound Block
NXT Sound Block - Overview -
The NXT Sound Sensor block gets data from the NXT Sound Sensor.You can measure the sound level as a percentage (0-100) and get a Numeric output.
You can also compare the sound level to a Threshold Value to get a Logic (True or False) output.
Use the Port Selector on the top of the block to make sure that the sensor port number (1, 2, 3, or 4) matches the port on the EV3 Brick that the NXT Sound Sensor is connected to.
Use the Mode Selector to select the mode for the block.The Inputs and Outputs available will change depending on the mode.