Introduction: High-Tech Spy Stethoscope!
Step 1: What You Need...
1) Stethoscope. I picked mine up at a local drug store (Walgreens) for $10
2) A pair of Stereo Multimedia Microphones. Chosen because of the low cost and decent specs. $12 on Ebay.
3) 3.5mm (mini) Stereo Y-Adapter. ($0. I had one laying around but they are probably a couple of bucks)
Step 2: Disassembly...
I disassembled the multimedia microhones using an X-Acto knife and assorted tools. I cut it down the middle to get to the cabling and also popped the top off the header to get the mics out. I ended up with 2 mics and 3.5mm connectors.
Step 3: Stethoscope Disassembly...
Remove the earpieces from the Steth. Then I drilled out the earpieces to the diameter of the mic housings. I used a Dremel with a grinding attachment to fine tune it.
Step 4: Reassembly...
I used a small dot of hot glue and inserted the microphones into the earpieces and then reassembled the earpieces on the Stethoscope.
52 Comments
Question 4 years ago on Step 1
I also just found these mini multi Media Microphones but not sure the dissambly would be as easy as yours? yours were kind older model. So do you think these will work and mic can be removed like yours?
https://www.ebay.com/p/Mini-Microphone-Mic-for-Laptop-Tablet-PC-Computer-3-5mm-Plug-2m-Cord-Black/1079836043?iid=381711149958&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D50543%26meid%3D11c402dbb0f142b680f4c35835184285%26pid%3D100005%26rk%3D3%26rkt%3D12%26sd%3D152177434512%26itm%3D381711149958&_trksid=p2047675.c100005.m1851
Question 4 years ago
Hi
First, I was really impress with what you created with Stethosop, its ingenious.
I watched your video several times and I think I found a similar Audio cable Mic and
I wanted to show the ebay link and to make sure these will work?, when you open ebay ad, please select Option "with Mic" in the ad. Also, on the bottom of the ad they were just a whole bunch other cables listed just like these, its already has a mic and I guess I just need to get earpieces from the Steth to fit them in. And there is only connector at the end that would connect to the Y-adapter. wanted to get your check first and get feed back to see if I these work and If I understood your instructions before I purchase. I think these will work:
https://www.ebay.com/itm/Replacement-Audio-Cable-Mic-Control-for-Shure-SE215-SE315-SE425-SE535-SE846/231879244336?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D50543%26meid%3Ddfda404251594b1fb2a1d0e237e6cd2d%26pid%3D100005%26rk%3D6%26rkt%3D12%26mehot%3Dag%26sd%3D232526612808%26itm%3D231879244336&_trksid=p2047675.c100005.m1851
4 years ago
How Is the Audio of this? can you hear people well? how well?
6 years ago
If you're looking for the smallest GPS tracker with audio and video recording with MMS message, here you go:
http://www.jammerspro.com/GPS-Locator-Spy-03-with-...
All you need to do is hide it somewhere in a room, under a table, in a closet or a handbag, it's so small nobody will even notice it.
7 years ago on Introduction
Here a professional wall microphone:
http://www.endoacustica.com/digital-stereo-stethoscope-wall-microphone.htm
14 years ago on Introduction
i cant find the mics anywhere
Reply 7 years ago on Introduction
I found this YouTube video interesting:
https://www.youtube.com/watch?v=MpjbvSwBUvs
.One more thing, all the other schematics I have looked at using LM386 have pins #2 & #3 reversed from the schematic published here.
This might not cause any problems, since nobody else has commented about this discrepancy.
8 years ago on Introduction
You are a genius!!
I am a physician blood pressure specialist
I need to measure BP sometimes 30 times a day
This device is fantastic because I do not have to plug the dirty stethoscope ear plugs into my ears !!
9 years ago on Introduction
How could these microphones be connected to an amplifier/speaker instead of an mp3 player?
10 years ago on Introduction
If you want to spend $400 you can get a stethoscope for the hearing impaired that has an amplifier on it. Take the diaphragm and secure it to the wall with a bracket and then there will be headphones Not as fun as analog scanners before phones went digital but a nice party favor.
12 years ago on Introduction
Does the adapter turn the headphone port on an MP3 player into a microphone?
Reply 11 years ago on Introduction
no just makes two ports instead of one. your mp3 has to have a mic port & recording capabilities
Reply 11 years ago on Introduction
Well my MP3 has a built in microphone, so I can't make this without a new MP3 player.
Reply 10 years ago on Introduction
you could rip it apart and extend the mic to the ear piece
13 years ago on Introduction
XD sam quit calling here ur old enough to be my father
Reply 12 years ago on Introduction
wierd thing is i was using my earbuds and the apparently the mic only picked up the sound from the left side o.O
12 years ago on Introduction
Thanks for sharing I'm know what I'm going to be doing while on vacation.
13 years ago on Introduction
i think that if u put only one mic into one earpiece and leave the other earpiece alone, u could hear wot u r recording and record only the info u need.
13 years ago on Introduction
Buy a spy ear kids toy, open it up, desolder the mic and resolder it with longer wires..... use this for your mic (doing it with just one mic as per your other comments). I added a 1.5AA battery to mine instead of the button cell. Gives nice amplification and a handy headpohne input jack to give the option if listening direct or plugging it into a recorder.
13 years ago on Introduction
Wouldn't it be easier to just buy the condenser mics from Radio Shack? I know they sell them.