It has long been a question of history and myth, how can microphones be used as speakers. It is known that the earliest usage of a microphone was for church organs, although they were later used for microphones in street corners.
The main usage of a microphone at this time was in recording. Thus, microphones and recordings were seen together and they served different purposes.
Nowadays, with the improvement of technology, microphones are used for a lot of other things than just recording.
Microphones today are digital. They can store a lot of information. And with the help of advanced software, they can also process this information to give us the desired result. In the past, microphones were big devices.
Today, they can fit into a shirt pocket. So, with the advancement of technology, smaller and more powerful microphones have been designed and we can now utilize them for various purposes.
In the past, the diaphragm was used to make a resonant noise which was picked up by a microphone. But, the quality of the sound produced from a diaphragm is poor and it tends to deteriorate after a certain length of time.
This makes microphones bulky and they are difficult to use. Hence, they cannot serve their purpose. Another disadvantage of using large diaphragms is that they can’t handle low frequencies.
Basic applications of the microphone
How can we make use of these newly invented miniature microphones? There are many good options. Let’s first look at a common application of microphones.
Sound waves form the basis of all music and if a singer or a guitar player wants to make a note sound better or warmer, he can adjust his diaphragm to change the frequency of his sound. The same technique is used in telephones to make long distance calls.
Suppose you are listening to a song on the radio and the singer is singing at a frequency that is beyond your hearing range, you can make use of a diaphragm to modify the frequency of the sound waves.
The diaphragm must move slightly to this end. If the diaphragm moves more than a few centimeters, the sound waves will get canceled and you will not be able to distinguish the singer’s voice from the background noise.
Suppose you want to keep a record of your kids’ games and you can not see the screen properly. You can make use of a microphone to record the sound waves coming from the computer.
What you need to know
It is not easy to explain a complicated thing like how the diaphragm must move to change the frequency of the sound waves. However, you can learn this from an expert who can teach you the technique.
Well, these can microphones can actually be transformed into something very useful. You can try to make use of these can microphones as speakers.
This is one of the most important things that a person must understand about a speaker. If you try to change the sound waves by moving the diaphragm, you may not get good results. Instead, you will have to focus on the distance between the speaker and the diaphragm.
The distance is determined by how much motion needs to occur in order to cancel the sound waves. You can try playing back the audio track and listen to see if you can hear better.
You will find that you can hear better if you adjust the distance between the diaphragm and the speaker.
How is a microphone similar to a speaker?
If you’re familiar with electronics, you know that all the electrical devices need a way to process sound waves. This is true for speakers as well.
As we know, a speaker produces sound waves when it’s set up properly. However, in order for the speaker to produce those sound waves into audible sound, it must resonate with the air surrounding it.
Let’s compare a speaker to a microphone using the same analogy. In the speaker analogy, the diaphragm acts like a microphone by picking up the vibrations and converting them to sound.
However, there’s something interesting about how the diaphragmophone works. It sounds almost the same as the words “diphragmophone” and “millimeterophone.”
A diaphragm, or literally, “diaphragm,” is a hollow rubber or plastic diaphragm which holds up the speaker. It’s located inside the speaker so that it can hold the vibrations.
It’s important that the diaphragm is in good shape since it determines how the sound waves are produced and ultimately how they get picked up and converted into sound.
If the diaphragm is not properly aligned, however, vibrations will not be produced and no sound waves will be produced.
How to pick up sounds with a microphone
It has been said that if you want to pick up the sound waves from a distant location, you should aim the microphone toward the source.
The problem with this, however, is that because the diaphragm is in the way, the waves won’t be picked up. The diaphragmophone is just an ordinary speaker with a miniature diaphragm attached.
One of the reasons why it works so well is that it uses sound waves to make the signal appear to come from a source. This means the diaphragm has to be in its correct place, meaning parallel to the speaker.
Another reason a diaphragmophone produces a better quality sound than other microphones is that there is more room to the air between the diaphragm and the speaker. This means that the sound wave strikes the air more directly, resulting in stronger sound.
How is a microphone similar to a speaker in general?
For one thing, a microphone collects sound waves, converts them to electrical signals and amplifies them.
A diaphragm acts as the lens through which the sound waves strike, greatly enhancing the sound quality. It also ensures that the air reverberates instead of hitting the lens and creating an echo.
To find out more about how a microphone works, it helps to understand how a diaphragmophone works. When a sound wave strikes the diaphragm, it moves the diaphragm vertically.
The diaphragm then pushes the piston up against the diaphragm pole. The piston moves up and down, which changes the level of the sound wave. As the piston moves up and down, the volume of the sound increases.
This process is repeated a number of times, making the diaphragm produces a different sound wave each time. Basically, a diaphragmophone makes use of sound waves to recreate a vibration in a cylinder that can then be amplified.
In essence, it works just like a tape recorder, except the sounds it records are digitally recorded instead of being on physical tape. Understanding how a diaphragmophone works can help you get an understanding of how a microphone works.
Understanding how a microphone works
Another way to look at how a microphone works is to think about how a violin works. Basically, a violin is made up of strings, which vibrate. In order for a violinist to achieve the right tone, he or she needs to hit each string at just the right time.
The same holds true for a microphone, although this scenario describes a much smaller component in comparison to the violin. In order to record sound, a microphone uses a series of microphones that capture the sound wave and convert it into an electronic signal.
A diaphragmophone consists of two diaphragms, or more if there are more than one. The diaphragm acts as a resonator.
This is a mechanical device that produces an electric signal when it is struck. Since each diaphragm has its own vibrations, when it is struck the signal is produced. As the diaphragm is struck, it changes the level of the signal.
When comparing a microphone with a diaphragmophone to a violin, you will notice some obvious similarities. The diaphragm acts like a violin bell, producing the sound of the note when it is struck.
However, the diaphragm does not vibrate and create the noise of a violin. This may seem like an obvious difference, but it has a profound effect on the quality of the sound that can be achieved by a microphone.
In general, it is easier to reproduce a higher quality sound with a diaphragmophone than it is with a violin.
How to use a microphone as a speaker
You may have heard of the theory on how to use a microphone as a speaker. There is something called the diaphragm and it works as a microphone. The diaphragm has certain areas that are filled with air like in the case of microphones.
This way the sound waves will hit the air and be captured. But the theory on how to use a microphone as a speaker involves more than just the diaphragm. It is important to know how sound waves are produced and reflected.
A diaphragm is used to keep the sound waves from escaping when placed at certain angles. If the diaphragm is moved by an object, like by a microphone, the sound waves will reflect back.
In order for a diaphragm to work properly, it must be placed in the right position relative to the direction of the sound waves.
Sometimes, there can be distortions if the diaphragm is moved at an angle other than horizontal. However, the range of distortions is dependent on how far away the source of the sound is.
Using microphone as a speaker is achieved when the diaphragm is moved vertically. When the diaphragm is moved horizontally, sound waves will reflect off of objects on the floor and thus cancel each other out.
That is why speakers that are put above your head will not pick up your voice. Instead, they will just bounce off the ceiling. That is what we call a zero-reflection diaphragm.
Of course, all of these sound waves come from something else. Sound waves travel through the air until they reach their final destination. Once they are at their final destination, the sound waves become compression waves.
These compression waves will change the sound that is coming from the speaker. It will either become crisp and clean or it will become distorted and muddled.
The easiest way to use a microphone as a speaker
If you are new to using a diaphragm as a speaker, the best way to do it is in the “A” direction. Simply place the diaphragm in the “A” direction for best results. Then, point the speaker toward your head so that the diaphragm is at your shoulder.
Point the speaker downward (toward your ears) so that it picks up the sound wave in the direction of your neck. And point it downward (toward your belly button). This is the best way to use a diaphragm as a speaker.
However, if you are trying to change a sound wave from a lower frequency to a higher one, you need to move the diaphragm in the “B” direction. Place the diaphragm in the “B” direction by pointing it upward.
Point the diaphragm downward again but in the opposite direction: toward your belly button. This is the way to use a diaphragm as a speaker when you want to move a sound wave from a higher frequency to a lower one.
Remember, if you want to move a sound wave from a higher to a lower frequency, then you need to move your diaphragm in a different direction.
Now let’s move on to talking about using a microphone as a speaker. You will need a microphone that has a cardioid pickup pattern so that you can get the sound wave to come through.
Some microphones have a cardioid pickup pattern that will pick up the sound as soon as it is thrown out of the speaker’s cone.
Other microphones have a Faraday plate that will pick up the sound just before it gets thrown out. There are other factors involved, but I’ll just mention a few.
Using a microphone as a speaker involves some physics and some simple theory. The theory part is really not that important, as long as you know how to use a microphone as a speaker, which is pretty easy.
If you’re just using it as a background sound, the theory probably isn’t that important. However, if you’re planning on doing recordings of yourself singing, or of someone else speaking, then you need to have some background knowledge.
I recommend getting a good home-study course on how to use a microphone as a speaker. It will give you the most information possible, including diagrams and videos.