The Microphone can be used for a variety of activities with sound waves.
Demonstrate how the wave pattern changes when frequency and amplitude are changed.
Compare the waveforms from various musical instruments.
Have students capture the waveform of the sound of a tuning fork and model the sine wave using a function.
Measure the speed of sound by using reflected sound waves in a tube.
Demonstrate beat patterns.
Determine the period and then the frequency of a sound by measuring the time between peaks on the waveform.
Display the fast Fourier transform (FFT) of a sound.
Note: Vernier products are designed for educational use. Our products are not designed nor are they recommended for any industrial, medical, or commercial process such as life support, patient diagnosis, control of a manufacturing process, or industrial testing of any kind.
Compatible Software and Interfaces
Choose a platform below to see its compatibility requirements.
CBL 2 and LabPro interfaces cannot be used with TI-84 Plus CE calculators.
DataMate cannot be used with color screen TI-84 Plus calculators; use EasyData with these calculators.
Connect the sensor to the interface (LabQuest Mini, LabQuest 2, etc.).
Start the appropriate data-collection software (Logger Pro, Logger Lite, LabQuest App) if not already running, and choose New from File menu.
The software will identify the sensor and load a default data-collection setup. You are now ready to continue your experiment.
If you are collecting data using a Chromebook™, mobile device such as iPad® or Android™ tablet, or a Vernier wireless sensor or interface, please see the following link for up-to-date connection information:
Connect the sensor following the steps in the Getting Started section of this user manual.
Some guidelines for collecting good waveforms:
By default, the microphone data‑collection parameters are set such that it will sample very quickly for a very brief time, effectively taking a “snapshot” of the sound waves present when data collection is started. With this in mind, start the sound source you wish to investigate before starting data collection.
Make sure the sound level is in the correct range to produce good wave patterns. If the sound is too loud, the wave pattern will be clipped off at the top or bottom. Move the Microphone farther from the sound source or turn down the volume of the sound.
The Microphone is uncalibrated, which means that the vertical axis has arbitrary units on waveform graphs. The voltage from the Microphone output is what is graphed. For more information, see www.vernier.com/til/656
Approximately 100 Hz to 15 kHz
1.45 mA @ 5 VDC
Default calibration values
intercept: 0 (arbitrary units)
How the Sensor Works
The Microphone uses an electret microphone that has a frequency response covering essentially the range of the human ear. An op-amp circuit then amplifies the signal and outputs it to the British Telecom (BTA) connector. The output signal is available on two pins in the BTA connector; for additional details see www.vernier.com/til/3639
The best source of clean, sine-like waveforms is an inexpensive keyboard set to the flute sound without vibrato.
If you have followed the troubleshooting steps and are still having trouble with your Microphone, contact Vernier Technical Support at email@example.com or call 888-837-6437. Support specialists will work with you to determine if the unit needs to be sent in for repair. At that time, a Return Merchandise Authorization (RMA) number will be issued and instructions will be communicated on how to return the unit for repair.
Vernier warrants this product to be free from defects in materials and workmanship for a period of five years from the date of shipment to the customer. This warranty does not cover damage to the product caused by abuse or improper use. This warranty covers educational institutions only.