How can I make a live microphone?


by adjacent
Tags: live, microphone
adjacent
adjacent is offline
#1
Aug17-13, 06:41 AM
PF Gold
adjacent's Avatar
P: 833
I want to make the input sound to go directly to the speaker without using any computer.
Can you please help me?
Phys.Org News Partner Engineering news on Phys.org
Lifting the brakes on fuel efficiency
PsiKick's batteryless sensors poised for coming 'Internet of things'
Researcher launches successful tech start-up to help the blind
mfb
mfb is offline
#2
Aug17-13, 04:46 PM
Mentor
P: 10,824
You need some sort of amplifier, otherwise you won't hear the result. It does not matter which amplifier you use, a computer is just one option.
Feedback from the speakers to the microphone could be an issue if the amplifier simply amplifies everything.
NascentOxygen
NascentOxygen is offline
#3
Aug18-13, 08:55 AM
HW Helper
P: 4,715
Quote Quote by adjacent View Post
I want to make the input sound to go directly to the speaker without using any computer.
Can you please help me?
I assume you mean without using any amplifier? You would have to experiment, i haven't tried it.

I know you can use a speaker as a microphone. So get two large speakers, 8Ω or so, (large speakers are more efficient.) Have them in different rooms, joined by speaker cable or electrical twin lead. If your friend gets close to one speaker and talks loudly, I think you will be able to hear faint talking if you put your ear close to the other speaker in a different room.

Let us know how you go.

adjacent
adjacent is offline
#4
Aug23-13, 04:12 AM
PF Gold
adjacent's Avatar
P: 833

How can I make a live microphone?


Quote Quote by NascentOxygen View Post
I assume you mean without using any amplifier? You would have to experiment, i haven't tried it.

I know you can use a speaker as a microphone. So get two large speakers, 8Ω or so, (large speakers are more efficient.) Have them in different rooms, joined by speaker cable or electrical twin lead. If your friend gets close to one speaker and talks loudly, I think you will be able to hear faint talking if you put your ear close to the other speaker in a different room.

Let us know how you go.
No.I want to eavesdrop on people.Firstly I have to make sound concentrate on one point by using a parabola.Then I have to put the microphone there and listen it live.
Bobbywhy
Bobbywhy is online now
#5
Aug23-13, 04:34 AM
PF Gold
P: 1,857
You can use a parabolic microphone. Here are hundreds of images of them in use:
https://www.google.com/search?q=para...w=1366&bih=683

Here is one of many sites where you can buy one:
http://www.amazon.com/gp/feature.htm...cId=1001230611
adjacent
adjacent is offline
#6
Aug23-13, 05:55 AM
PF Gold
adjacent's Avatar
P: 833
Quote Quote by Bobbywhy View Post
You can use a parabolic microphone. Here are hundreds of images of them in use:
https://www.google.com/search?q=para...w=1366&bih=683

Here is one of many sites where you can buy one:
http://www.amazon.com/gp/feature.htm...cId=1001230611
My parents won't let me do it..I just want to make the microphone to immediately output to speaker.
I'm not so good at electric things but will this work?
Attached Thumbnails
dsaf.png  
mfb
mfb is offline
#7
Aug23-13, 06:05 AM
Mentor
P: 10,824
No.
It is not sufficient to have something which can provide power... you need some way to amplify the signal (apart from special conditions like the parabolic microphone and so on).


Register to reply

Related Discussions
Every decision I make makes my life a little bit worse and I donít wish to live anymo General Discussion 4
Laser Microphone General Physics 2
Microphone Help. Electrical Engineering 1
Audio, how to make microphone unidirectional? General Physics 11
Make a living, live for our Maker. General Discussion 0