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View Full Version : Measuring Decibels or sound level with the Basic Stamp



roboticmaggot
01-23-2007, 11:45 PM
Hello,

I am interested in creating a device that will measure the decibel or sound level in a room. I was thinking that there must be some way to hook a microphone to an A to D converter with could send pulses to a Basic Stamp. Does this sound right? Can anyone point me to any resources? Thanks for any help.

Zoot
01-24-2007, 12:00 AM
This gentleman sold all his boards, I believe, but his schematic and parts list is available at the forums. This is a two-channel audio level sensor with A/D for shifting data into the Stamp.

http://forums.parallax.com/showthread.php?p=572182

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When the going gets weird, the weird turn pro. -- HST

roboticmaggot
01-24-2007, 12:08 AM
Great. I'm going to check this over. Thank You so much.

Steel
01-25-2007, 01:04 AM
If people have a need for any of these, I can fab some up.

Zoot
01-25-2007, 01:09 AM
What would you be asking for the boards?

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When the going gets weird, the weird turn pro. -- HST

Steel
02-01-2007, 11:47 PM
Sorry about taking so long to get back...I lost the thread.

I wouldn't know right now. I am currently working on 2 projects...but if I have some free time I can make a design and find out the cost of boards. (I will get back within the week.)

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sam_sam_sam
02-02-2007, 12:16 AM
roboticmaggot

Keep us posted how thing are going with your project

I am also interested in a device that will measure the decibel or sound level in a room.



Thanks

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··Thanks for any·http://forums.parallax.com/images/smilies/idea.gif·that you may have and all of your time finding them

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Sam

Steel
02-02-2007, 12:30 AM
IF this is specific for measuring dB...There are a few ways of Measuring dB...dBmV, dBspl.

Are you more interested in getting just the volume of your surrounding, or the actual sound pressure.

...And if it is just volume...are you just looking for the "Max" volume, or are you interested in frequency responses?

metron9
02-02-2007, 01:24 AM
Two additional questions, how much resolution do you want and how fast do you want to measure the sound level, You could use a basic stamp and 8 pins to get 8 sound levels for example with an op amp a small condenser mic and a few resistors and a capacitor or two.

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Think Inside the box first and if that doesn't work..
Re-arrange what's inside the box then...
Think outside the BOX!