There are two types of microphone capsules: one is: dynamic coil and the other is: condenser.
A brief comparison of dynamic microphones and condenser microphone capsules
Points of comparison of dynamic microphones and condenser microphones
Design principles
p>< p>Using the principle of electromagnetic power generation, the voice coil is mounted on the vibrating membrane, and then placed between the magnetic field of the magnet, and the sound induced by the vibrating membrane is indirectly converted into digital signals. electrical energy through the voice coil.Using the principle of charging and discharging the capacitor, the sound pressure induced by the ultra-thin vibrating membrane directly changes the voltage between the electrodes and converts it into an electrical energy signal.
Diaphragm
Since the diaphragm must carry a voice coil over a hundredtimes heavier than itself, it cannot be used too thin and light, so the total weight of the diaphragm is more than a thousand times that of the capacitive type.
Using an ultra-light and thin diaphragm with a thickness less than one tenth of that of a moving coil type and a total weight less than one thousandth of that of a moving coil type, it directly detects sound pressure and exhibits extremely superior physical properties.
Voice coil
Use a charged voice coil on the diaphragm to convert induced sound pressure into an electrical energy signal. No need for a voice coil at all.
Signal output
Output directly from the voice coil or via a coupling transformer. Output coupled by field intensity transistor (FET) or vacuum tube.
Frequency response
Due to the thick diaphragm and voice coil, the high range cannot be reachedut not be extended because the impedance of the voice coil and the conversion efficiency of the magnetic field attenuate as the magnetic field increases. The frequency decreases, the response in the low frequencies also deteriorates accordingly.
Since the ultra-thin diaphragm directly detects sound pressure and converts it into electrical energy signals, the frequency response can extend from ultra-low frequencies to ultrasonic waves.
Sensitivity
Due to the thickness of the diaphragm and the limitation of the voice coil, it is slow to respond to weak sounds and has low sensitivity in l conversion 'electrical energy.
The diaphragm is extremely thin and light, and exerts no load on the voice coil. It is very sensitive to extremely quiet sounds and has high sensitivity in converting electrical energy.
Touch sound
Due to the thick diaphragm and thea moving coil, it is difficult to overcome the contact noise, which seriously affects the normal sound quality.
The diaphragm is extremely thin and light, and has excellent characteristics for eliminating contact noise.
Robust and drop-resistant
The sound head is large and heavy. The failure rate in the event of an impact or accidental fall to the ground is high and cannot be repaired.
The capsule is made of lightweight material, weighing only a few tenths of that of a mobile capsule, and the failure rate when falling to the ground is extremely low.
Volume and weight
Disadvantages of large size and high weight. It has the advantages of ultra small size and light weight.
No bias required
Requires inter-electrode voltage and coupling circuit power
Instant response characteristics
Sound diaphragm and load Total weightl is more than a thousand times that of the capacitive type, and its response to sound pressure is slow, like the starting and braking dynamics of a fully loaded truck. The operation is slow and the instantaneous response time is long .
Because the diaphragm is extremely thin and light, it reacts quickly to sound pressure, just like a sports car when empty. It features flexible starting and braking movements and fast instant response time.
Tone
Due to the slow instantaneous response characteristics, the timbre is softer and fuzzy, making the singing sound like a foggy landscape under a layer of mist, showing the original sound. The resolution is smoother and the tone is softer.
Due to the characteristics of fast instant response and extremely clear and bright timbre, proficient singers choose condenser microphones to highlight their natural vocals.nt beautiful and make their singing sound like they are under the sun. the screen is clear and bright, and the high-resolution, crisp and beautiful sound is intoxicating.
Application
It is more suitable for use in outdoor environments such as rock music and vocal singing and where the background noise is loud and the sound is louder.
In addition to being suitable for vocal singing in various occasions, the application of voice amplification can also achieve the clearest and most powerful vocal effect without "box sound", by especially when recording percussion instruments or music with higher frequencies; For high-pitched orchestral instruments and in concert halls, theaters, recording studios or places where the best sound quality is required with low background noise, condenser microphones are best suited.
Dynam microphones and speakersics work on the same principle?
Here is the circuit diagram of an FM wireless microphone. The high-frequency transistor V1 and the capacitors C3, C5 and C6 form a three-point capacitor oscillator. For beginners, we don't need to think about the specific working principle of the capacitor three-point oscillator for now. You should know that this circuit structure is a high-frequency oscillator. The charge C4 and L of the triode collector form a resonator. The resonant frequency is the transmitting frequency of the FM microphone. According to the component parameters in the figure, the transmitting frequency can be between 88 and 108 MHz, which just covers the. FM radio reception frequency. By adjusting the L digital value (stretching or compressing the L coil) can easily change the broadcast frequency and avoid FM radio stations. The transmitted signal is coupled to the antenna via C4then transmitted.
R4 is the base bias resistor of V1, which supplies some base current to the transistor so that V1 operates in the amplification area. R5 is the DC feedback resistor, which stabilizes the operating point of the transistor.
The frequency modulation principle of this FM microphone is to achieve frequency modulation by changing the capacitance between the base and the triode transmitter when the sound voltage signal is added to the base of the triode, the base of. the triode and the capacitance between the transmitters will change synchronously with the size of the sound voltage signal, and at the same time, the emission frequency of the triode will change, realizing frequency modulation.
Is the principle of the generator electromagnetic induction or magnetic generation of electricity?
It's quite the opposite, the microphone picks up sound and The speaker amplifies the sound.
Microphoness dynamics use the principle of electromagnetic induction. The metal coil is mounted on the diaphragm and then placed between the magnetic field of the magnet. When sound pressure changes, it continually moves within the magnetic field. The movement generates induced currents that convert sound signals into electrical signals. Its transduction principle is very similar to that of a loudspeaker.
Audix Dynamic Microphone
The principle of the generator is of course electromagnetic induction... Magnetism generates electricity It's a popular saying.. . which is not written. ..
Microphones, tape recordings, etc., which transmit sound, are all electromagnetic induction
Which is used to reproduce sounds, such as high -speakers and tape playback, are all current magnetic effects
Mainly, you can understand the principle by clearly distinguishing thea signal conversion
The microphone converts the sound signal into an electrical signal, which is transformed into electricity (generating a specific current), it is therefore an electromagnetic induction
The speaker is like this. Sound playback equipment converts existing electricity into vibration (vibration and sound are generated by changes in the magnetic field. Electricity generates magnetism, so it is a current). magnetic effect