Sound source localize

[rolfk]

And which myRIO model do you have? The myRIO-1900 has in total 8 single ended analog inputs 0-5V which is fine for external voltage measurement but kind of non-ideal for sound and similar input. It also has 2 differiential analog inputs with a range of -+10V which works better for sound measurement (though you may want to have some amplification and/or limiting of your signal to make sure the signal is in the right range for this input).

Generally I'm not in favor of connecting any external signal directly to a computer, even if it is an embedded computer like the myRIO, but for a quick and dirty lab setup that may be tolerable. So once you resolved the issue about what kind of signal your hydrophones deliver (microphones without some built in amplifier generally have a signal in the range of mV rather than V and will not give you a great dynamic if you connect them directly to a +-10V analog input), you can look further about how to program this.

[Henrik_Volkers]

And keep in mind that all myRIO analog inputs are multiplexed inputs (as far as I found in the spec) ->

That involves some phase corrections!

[MohamedOsama]

How can i take input from hydrophone with ni-myRIO ? (if can't what is hardware i need ?)

[RavensFan]

This has been moved back to your original thread where you were first asking this question.

I asked you what kind of signal this hydrophone put out, but you failed to answer.

[m.ezzat58]

voltage signal our question is that , is there any daq unit in myrio or we need an external daq . and how can we use it

[RavensFan]

Which myRIO do you have?  The MyRIO 1900 says it has 2 differential analog inputs for +/-10V built in.

Have you read the manual for it?

NI myRIO-1900 User Guide and Specifications

[rolfk]

Most hydrophones have mV outputs at most, unless they have a preamplifier built in. So connecting them directly to the +- 10V input will be pretty suboptimal. A preamplifier requires power so if your hydrophone has somehow a box with batteries or a power supply connection, it probably has a preamplifier but otherwise not.