Condenser microphones are also called electret microphones. This kind of microphone is the most common, such as the built-in microphone of a common recorder. Because it is cheap, compact, and the effect is not bad. Sometimes called Mitou. The following editor will introduce the characteristics of condenser microphones.
Features of condenser microphones:
1. It can directly convert sound into electrical energy signal
Condenser microphones use the principle of capacitor charging and discharging between conductors. Ultra-thin metal or gold-plated plastic film is used as a vibrating film to induce sound pressure, which changes the static voltage between conductors and directly converts them into electrical energy signals, which are practically coupled through electronic circuits. The output impedance and sensitivity are designed. Can show the characteristics of original sound reproduction.
The audio experts take the pursuit of "reproduction of the original sound" as the highest level of audio! From the analysis of the basic design principles of microphones, it is not difficult to find that condenser microphones not only rely on sophisticated mechanism manufacturing technology, but also combine complex electronic circuits to directly convert sound into electrical energy signals. They have inherently superior characteristics, so they become a pursuit. The best choice for those who "reproduce the original sound".
2. It has an extremely wide frequency response
The diaphragm is the main component of the microphone that senses sound and converts it into electrical energy signals. The material of the diaphragm and the design of the mechanism determine the characteristics of the microphone's sound quality. Because the diaphragm of a condenser microphone can be made of extremely thin and light materials, and the induced sound pressure is directly converted into an audio signal, the frequency response of the bass can be extended to ultra-low frequencies below 10 Hz, and the treble can easily reach tens of KHz. Ultrasound, showing very wide frequency response characteristics!
Has ultra-high sensitivity. Because there is no voice coil load on the diaphragm, an extremely thin and light design can be used, so not only the frequency response is extremely superior, but also has excellent sensitivity, can sense extremely weak sound waves, and output the clearest, finest and accurate original sound!
Three, fast transient response characteristics
In addition to the characteristics of the diaphragm that determine the frequency response and sensitivity of the microphone, the ability to respond to sound waves, the so-called "transient response" characteristics, is one of the most important factors affecting the timbre of the microphone. The speed of the microphone's transient response characteristics is determined by the weight of the entire diaphragm. The lighter the diaphragm, the faster the response speed. The extremely thin diaphragm of the condenser capsule has extremely fast transient response characteristics, which can show clear, bright and powerful sound and precise audio and video. In particular, there is no sound staining and "box sound" in the middle and low frequencies, and the high pitch is delicate and crisp, which is the most significant timbre characteristic of the capacitive type. It can be clearly seen from the following figure that the transient response characteristics of the condenser capsule are much better than those of the moving coil.
Fourth, it has the characteristics of ultra-low touch noise
When using a handheld microphone, the touch noise caused by contact with the palm of the hand makes the original sound mixed with additional noise, which has a huge impact on the sound quality, especially for wireless microphones with pre-amplifier circuits, so touch noise becomes a judge of the quality of the microphone. Important project. From the perspective of physical phenomena, the goose feathers fall to the floor like the copper plate, and the goose feathers can hardly hear the falling sound, while the copper plate is very loud, indicating that the lighter material has less impact than the heavier. In the same way, the diaphragm of a condenser microphone is relatively light, and inherently has the excellent characteristics of "ultra-low touch noise".
5. It has the characteristics of drop resistance and impact resistance
Using the microphone will inevitably cause malfunctions or abnormalities due to accidental drop and collision. Since the condenser capsule is composed of lighter plastic parts and a strong light metal shell, the impact force of falling to the ground is small, the failure rate of damage is low, and the volume is small and the weight is light. Condenser microphone adopts ultra-thin diaphragm, which has the characteristics of small size, light weight, high sensitivity and superior frequency response, so it can be designed as an ultra-small microphone (commonly known as little bee and little ant). It is most suitable for assembly in wireless On the microphone.
Condenser microphones have the above-mentioned excellent characteristics and have become the favorite of sound engineering experts and singers. Wireless microphones have become a trend in the world today to sing on stage or karaoke at home. Wireless microphones can provide capacitive sound by themselves. It has all the advantages of condenser microphones, and has become the best microphone that professional audio experts dream of in the digital audio era.