Vernier Software and Technology
Vernier Software & Technology

Analyze Microphone Data


In the following steps, you will create a program using the Analog Express VI to collect microphone data for a length of 0.05 second at a rate of 10,000 samples/second. The raw microphone data will be displayed on a graph. The program will then apply a low-pass filter to the raw data to reduce the amplitude of the high frequency noise, thus smoothing out the data set. The filtered data are then analyzed to determine the frequency and amplitude of the tone. The filtering and analysis will be programmed using LabVIEW Signal Analysis Express VIs.


In this exercise, you will

  • Create a LabVIEW VI.
  • Incorporate LabVIEW Express Analysis functions.
  • Use the Execution Highlight feature to study data flow.
  • Display data using numeric and graphical indicators.

Sensors and Equipment

This activity features the following Vernier sensors and equipment.

Additional Requirements

You will also need

Hands-On Introduction to NI LabVIEW with Vernier

See other experiments from the lab book.

1Open and Run an Example VI
2Read Microphone Data
3Analyze Microphone Data
4Continuous Read and Analyze Microphone Data
5Read Temperature Data
6Above Threshold Warning of Temperature Data
7Create a Temperature Conversion SubVI
8Control Analog Out, Digital Out and Pulse Out
9Build a Sensor Control Program

Activity 3 from Hands-On Introduction to NI LabVIEW with Vernier Lab Book

<em>Hands-On Introduction to NI LabVIEW<sup>™</sup> with Vernier</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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