Sonar Demo

Sonic distance measurement using Windows sound card for data acquisition.

Description

In this demo the Windows sound card is used as a data acquisition device. A chirp waveform is played out the speaker and captured by the microphone concurrently. The time delay between pitch and catch indicates separation distance. The time delay is determined using signal processing concepts (cross correlation and Hilbert pre-envelope). A graphical user interface makes operaton simple. This demo illustrates the basic principle; distances are not calibrated for accuracy.

• Required Products: Data Acquisition Toolbox
• MATLAB release: MATLAB 6.1 (R12.1)
• Other requirements: Windows sound card, speaker and microphone (preferably with ability to change separation distance).

[Vladimir Molchanov]

 

[Mohamed Alzebdah]

Has a good Accuracy in long distance insted of small distance.Could be improved if the ability of collaboration is added.
But in the overall "Well done" and Thank you.

[lalit dhingra]

ver good

[neila castellanos lozano]

 

[magrini antonio]

 

[Muhammad Shahzad]

for checking

[Muhammad Shahzad]

checking

[deep sing]

i tried it by playing a sample wav file..but the execution of sonar_anal file gives the follwing error "Input argument "fig" is undefined". Can u elaborate on ways to execute the sonar demo considering my novice exposure to matlab

[david via]

 

[Amitava Biswas]