Maybe you have heard of the condenser and the moving coil type before, and I know that there are ISK microphones (yes, Hua Zhijian’s products). So what are the differences between the dynamic wheat and the condenser wheat?
If you choose a microphone that suits you, how do you choose?
What is the difference between the nature of the work?
The so-called dynamic microphone (hereinafter referred to as dynamic microphone) and condenser microphone (hereinafter referred to as condenser microphone) refer to the type of microphone pickup. The common microphones on the market are mainly divided into these two types. So what is the difference between the two in working principle? The dynamic wheat is based on the principle of electromagnetic induction. The wire coil is mounted on the diaphragm, and then placed between the magnetic fields of the magnet. The sound current changes continuously in the magnetic field to generate an induced current, thereby converting the sound signal into a signal. . Its switching principle is very similar to that of a Speaker.
Capacitor Mai uses the charging and discharging principle of the capacitor. The vibration of the sound drives a plate of the capacitor (ultra-thin metal film). The vibration of this plate changes the distance between the two plates, which in turn changes the capacitance. When the capacitance becomes larger, the power supply charges the capacitor; when the capacitance becomes smaller, the capacitor discharges, thereby generating a current in the circuit and converting the sound signal into a signal.
What is the difference between the two structures?
Structurally speaking, the dynamic ring wheat is mainly composed of a coil, a diaphragm and a casing, and has a firm structure, stable performance, relatively durable, and easy to control cost. So the microphones we usually use in KTV are mostly dynamic. Of course, there is another reason. The use of dynamic wheat is also very simple. It can be used even when connected to the equipment, without DC working voltage.
But for Capacitor, everything becomes less simple. Structurally, the internal capacitor of the sound head has a complicated structure, the electrode plate (ultra-thin metal film) is relatively fragile, the cost is expensive, and it is afraid of moisture, fear of falling, and high maintenance cost. In addition, there is an amplifier in the condenser, which needs power supply to work. However, due to the size of the Professional Condenser Microphone, this power supply is usually designed as an external type, and its name is called “Phantom Power”.
The so-called “phantom power” power supply means that the audio signal current can be transmitted in the same audio signal line, and the DC power supply voltage can be transmitted. In general, most condenser microphones require 48V phantom power, so many professional mixers also have built-in 48V phantom power. However, some professionals have also said that the use of 48V phantom power will produce current sound, which will affect the final recording effect, but I think this is limited to some professionals who are nitpicking the sound quality? I don’t know what everyone thinks about this.
Electret condenser wheat:
In addition, there is a capacitor wheat battery powered, known as electret condenser wheat, which has the characteristics of small size, simple structure, good electroacoustic performance and low cost, and is suitable for mass production. Widely used in conferences, voice communication equipment, voice recorders, video cameras, mobile phones and other products. However, the sound quality of the electret condenser microphone is relatively poor, so it is often used in situations where the sound quality is not high.
What is the difference between the two sound qualities?
As we said before, dynamic wheat is widely used in entertainment such as KTV or performance. In addition to low cost and simple use, is there any other reason? This requires starting from the other characteristics of the dynamic circle. Due to the structure, the sensitivity of the dynamic ring wheat is relatively low, and the frequency response is not wide enough (the frequency response range is 50 Hz to 15 kHz, and the human ear can hear the frequency response range is 20 Hz to 20 kHz). Therefore, its high-range extension is not good enough, and the weak sound induction will be slower (slow transient response). Simply put, the sound is not delicate enough and the details are not rich enough.