Electronic Stethoscope Projects
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Electronic Stethoscope Projects
How do I connect a three wire electret mic to a circuit that uses a two wire electret mic?
http://www.diy-electronic-projects.com/p240-Electronic-Stethoscope
Find out which pin isn't sending any electrical signals.
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Unnamed Doctor Wearing an Electronic Stethoscope $69.99 Unnamed Doctor Wearing an Electronic Stethoscope - Photographic Print |
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Doctor Using Electronic Stethoscope on a Patient $69.99 Doctor Using Electronic Stethoscope on a Patient - Photographic Print |
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Electronic Projects For Musicians $8.49 Electronic Projects For Musicians |
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3M Littmann Replacement Diaphragm for Electronic Stethoscope $12 3M Littmann Replacement Diaphragm for Electronic Stethoscope |
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Electronic Projects from the Next Dimension $45.51 Electronic Projects from the Next Dimension |
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Electronic Projects for Musicians $14.73 {^Electronic Projects for Musicians} is the second collection of stray tracks by {$the Apples in Stereo}. The first, {^Science Faire}, appeared in 1996 and covered the early days of the band before the release of {^Fun Trick Noisemaker}. This disc rounds |
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ADC 657BK Electronic Stethoscope $111.82 Electronic stethoscope is the next step in medical technology Diagnostic tool amplifies up to 16 times (24db) over acoustic competitorsStethoscope features noise filtering and ergonomic designPatented piezopolymer film contact microphone provides wider frequency response than acoustic mikes used in competing models Three frequency modes: Bell (15-200Hz) for cardiac sounds, Diaphragm (100-500Hz) for lung sounds, Extended Range (15-1000Hz) for both Eight level volume control with audible tone Holds last mode and volume setting for convenience Auto-shut off after 3 minutes extends battery life Battery warning LED signals when replacement needed Binaurals fixed at 15-degree angle for snug aural fit Specially constructed Adsoft PVC eartips for the ultimate in wearing comfort and acoustic seal Uses one AAA battery (included)Weighs six (6) ouncesFSA eligible with a physician's letter The content on this site is not intended to substitute for the advice of a qualified physician, pharmacist, or other licensed health-care professional. The products may have additional information and instructions on or inside the packaging that you should carefully read and follow. Contact your health-care provider immediately if you suspect that you have a medical problem. The use of dietary supplements may not have been evaluated by the Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease or health condition. |
 Omron Sprague Rappaport Stethoscope, Black List Price: Sale Price: $11.76 You save: $7.24 (38%)  Eligible for free shipping!Availability: Usually ships in 24 hours  |
 3M Littmann 2201 Classic II S.E. Stethoscope, Black, 28 inch List Price: Sale Price: $63.46 You save: $30.99 (33%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 3M Littmann 2141 Master Classic II Stethoscope, Black, 27 inch List Price: Sale Price: $102.15 You save: $43.10 (30%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 3M Littmann Lightweight 11 SE Stethoscope, 28", Black, #L2450 List Price: Sale Price: $41.75 You save: $15.90 (28%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 3M Littmann 3128 Cardiology III Stethoscope, Black, 27 inch List Price: Sale Price: $147.56 You save: $58.64 (28%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 3M Littmann 2210 Classic II S.E. Stethoscope, Raspberry, 28 inch List Price: Sale Price: $68.46 You save: $25.99 (28%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 DUAL HEAD STETHOSCOPE ROYAL BLUE Sale Price: $4.70 Eligible for free shipping!Availability: Usually ships in 1-2 business days |
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Understanding Waveguides
All around us there are powerful waves that can be used for communication, power, and transmission. Harnessing these waves and using them requires special knowledge and equipments. And everything begins with the waveguide.
Waveguides are instruments or structures built specifically to channel waves to a location. Without waveguides, much of our communication systems today would be useless. Waves like sounds and electromagnet are crucial to our everyday life even though they not given much thought by many people. If there is no object to guide these waves, the internet wouldnt be possible.
For every kind of wave there is a specific wave guide. Electromagnetic waves cant be guided by waveguides for microwaves or sound waves and vice versa.
There are natural and artificial waveguides. Artificial or manufactured waveguides can be bought in any electronic shop or industry suppliers depending which type you need. Students are often taught how waveguides are used and even have science projects using them.
Waveguides occur in nature as well. These are not manufactured and created by natural means like a particular layer in the ocean that helps sound waves emitted by whales and other sea creatures reach long distances. Another example is the sound wave travelling in a cave. This principle was adapted to create the medical stethoscope.
Since waves are a natural phenomenon, the idea to create an object that can guide them was not surprising. People knew that it was possible but just didnt know how to do it. It was in 1893 when scientists first began to explore the feasibility of building waveguides.
J.J. Thomson proposed the concept of studying waves but O.J. Lodge in 1984 was the first man to actually do an experiment on the theory. And in 1897 Lord Rayleigh made a mathematical analysis of electromagnetic waves and then published another one on sound waves which was called The Theory of Sound.
In our day to day activities, we dont really see it but most of them are centered around objects that rely on the power of waves. Electronic gadgets like the TV and cell phone all use waveguides. Cars, planes, ships, and other vehicles also depend on waveguides for their proper function.
Truly, Mother Nature has given us a wonderful gift in the form of these waves. But what is more amazing is the gift of knowledge given to those who have created the waveguides. Without their brilliant accomplishments, wed still probably send pigeons to carry our mail.
About the Author
Today, we use more
microwave technology
than we we even know. Most companies have been in great need of waveguides and other
waveguide compoonents
.
