Analyze Microphone Data
Recommended for grades 9–14.
Introduction
In the following steps, you will create a program using SensorDAQ’s 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.
Objectives
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 requires each of the following Vernier sensors and equipment (unless otherwise noted):
Additional Requirements
You will also need a SensorDAQ interface and LabVIEW software for data acquisition.
Download Experiment Preview
The student-version preview includes:
- Step-by-step instructions for computer-based data collection
- List of materials and equipment
The preview does not include essential teacher information, safety tips, or sample data. We strongly recommend that you purchase the book for classroom use.
Standards Correlations
No standards correlations for this experiment.
Experiment 3 from Hands-On Introduction to NI LabVIEW with Vernier Lab Book
Included in the Lab Book
Vernier lab books include a CD with word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.