How do I measure Sound Levels and send a signal when the sound level reaches a certain level?

[KateB]

Hi Seankilly,



For hardware, I recommend:

1. NI 9234: It can directly connect to IEPE microphone. You may find more information from http://sine.ni.com/nips/cds/view/p/lang/en/nid/203421

2. NI 9401: You can find more information about this TTL DIO from http://sine.ni.com/nips/cds/view/p/lang/en/nid/201849. If you use diffrent voltage level for sending digital signal, you may select one from http://sine.ni.com/nifn/cds/view/main/p/sn/n19:Windows,n21:7056,n24:cDAQ,n4:7692/lang/en/nid/1036/ap/daq/ps/25.

3. NI cDAQ-9172: You should use this chassis for operating above modules. You may find more information from http://sine.ni.com/nips/cds/view/p/lang/en/nid/202545.



For software, I recommend:

1. LabVIEW: Graphical development system. You may find more information from http://www.ni.com/labview/.

2. Sound and Vibration Toolkit: Include a set of function to measure sound signal for LabVIEW. You may find more information from http://sine.ni.com/nips/cds/view/p/lang/en/nid/12152.


Once you've evrything installed ready, you can find an example program from LabVIEW>>Help>>Find Examples>>Search with "sound" key word. There are couple of sound
level examples you can modify.

Then, in example finder, go to folder Hardware Input and Output>>DAQmx>>Digital Generation for an example of sending digital signal.

By mixing two example together, you should be able to achieve your task.



Regards, Kate

[seankillyourself]

Hi, forgive me for not elaborationg my project. I'm quite new to the forums.

I'm currently working on a simple microphone circuit and using an NI USB - 9162 daq (http://sine.ni.com/nips/cds/view/p/lang/en/nid/14166). I am also using labview as my programme to measure and record and send a signal to an led light connected by wires. The problem i have now, is writing a programme to convert the signal from the sine wave to a sound level for example decibel level. Thanks. 😄

Message Edited by seankillyourself on 01-07-2009 08:58 PM

[KateB]

Hi Seankilly,

9162 is just a carrier.

It's not a module itself.

Please name a module you've in hand so that I can give more information.

Another thing is that I don't think a module applicable with 9162 has both analog and digital funciton in one module.

Therefore, I don't think you've enough hardware in your hand.

Regards, Kate