Spectrum Analyzer: Measuring Quiet Sound Frequency

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SUMMARY

The discussion focuses on measuring the frequency of quiet sounds using spectrum analyzers. Users recommend utilizing Fast Fourier Transform (FFT) capabilities of the software to identify lesser peaks corresponding to the desired low-frequency sounds. Additionally, applying a band-pass filter to the original signal is advised to eliminate more prominent frequencies, allowing for more accurate frequency measurement of quieter sounds. Participants also inquire about specific equipment details, such as the model of the spectrum analyzer and the type of microphone and preamp used.

PREREQUISITES
  • Understanding of Fast Fourier Transform (FFT) techniques
  • Knowledge of band-pass filtering methods
  • Familiarity with spectrum analyzer models and specifications
  • Experience with audio signal processing
NEXT STEPS
  • Research how to implement FFT in audio analysis software
  • Learn about different types of band-pass filters and their applications
  • Explore various spectrum analyzer models and their features
  • Study audio signal processing techniques for measuring low-frequency sounds
USEFUL FOR

Audio engineers, sound technicians, and researchers interested in accurately measuring low-frequency sounds in various environments.

Physicist1011
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Homework Statement


How can I measure the frequency of a really quiet sound. The software I have only measures the peak frequency (so not the frequency of the sound I want to measure which is lower f).

Homework Equations

The Attempt at a Solution

 
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If your software can do an FFT, the frequency you are looking for should show up as one of the lesser peaks.

Alternatively, apply a band pass filter to the original signal - to exclude all of the more prominent frequencies. Then do your frequency measurement on the result.
 
Physicist1011 said:

Homework Statement


How can I measure the frequency of a really quiet sound. The software I have only measures the peak frequency (so not the frequency of the sound I want to measure which is lower f).

Homework Equations

The Attempt at a Solution

This doesn't really look like homework -- if it's a general interest question, I can move this thread to the EE forum.

And can you expand on your question some? Do you actually have a spectrum analyzer? If so, what model? What microphone are you using, and what preamp? What is the source of the sounds?
 

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