What should I do if the microphone is low?
1. Install the latest driver
Because the driver function of Win7 is much more powerful, the author's notebook is automatically equipped with a sound card driver after the system is installed, and it is normal to listen to songs and watch movies at ordinary times, and it is normal to sing a song or something with the system recorder.
But this is probably the problem, so I suggest that everyone update their sound card drivers, and you can search and download them at the driver center of the driver's house. You can also download the driver wizard to update the latest drivers.
2. Set the microphone correctly
After the driver is installed correctly, you need to turn on the microphone function. In XP, you can simply click the small speaker button in the taskbar to set it, but the corresponding position in Win7 has changed, so you need to distinguish it carefully.
enter the control panel, select the sound item, and then switch to the recording tab to see if the microphone is set as the default device. Of course, some sound cards may have multiple microphone options, so choose the correct microphone.
3. Turn off the microphone effect
Through the above settings, your microphone may have sounded normally, but if you find that the microphone sound is relatively low, you need to make detailed settings. On the Recording tab in the second step, double-click the default microphone icon to enter the detailed settings and switch to the Level option.
drag "microphone" to 1, and "microphone enhancement" to+3.dB. If the sound is loud, you can turn it down, but if the sound is low, it is difficult to adjust it. In addition, under the "Enhance" tab, you can also disable all sound effects. According to many user feedback, turning on these effects may cause the microphone to have a low volume problem or even silence, so just select "Disable all sound effects".
tips for purchasing microphones
1. the appearance of microphones is very important
genuine microphones are usually beautifully packaged and have beautiful designs. The tube body of hand-held wireless microphone must have a size suitable for hand holding and a beautiful shape. Generally, the traditional tube body is bamboo tube or trapezoid, which is not only unattractive, but also not suitable for hand holding, especially for users who are prone to sweat, and it is not easy to hold it tightly and slide down. There should be no burr on the screen cover of microphone, and it should not be damaged. The microphone line should have a trademark brand consistent with the microphone.
2. The microphone should adopt advanced hidden antenna design
The advanced wireless microphone overcomes the technical difficulties, no longer uses the outdated external design, but adopts the most perfect hidden antenna design, so that the wireless microphone has the advantages of convenient use, safety, beauty and no breakage.
3. To assemble a good sound head
The quality of the sound head determines the quality of the wireless microphone. There are two types of sound heads: moving coil type and capacitive type. The moving coil type converts acoustic energy into electrical energy signals between high-density magnetic fields by coils loaded on the diaphragm. There is a certain limit in the voice coil characteristics of this kind of sound head. But it is basically simple in structure and cheap, and it is the most popular model on the market. Capacitive microphone is a microphone with high technical level in combination with electronics and structure. Its pronunciation is to directly convert sound into electric energy signal by using the change of inter-electrode capacitance and ultra-thin gold-plated diaphragm. The most important feature of advanced condenser microphone is that it can display extremely clear original sound quality, with very wide and flat high and low frequency response, very high sensitivity, large directivity and dynamic range, small distortion rate, light volume, fall resistance and low touch noise. At present, it is widely used in recording studios, professional stages, testing instruments and other professional equipment.
4. Microphone should have the superior characteristics of low touch noise
Hand-held wireless microphone has an impact on normal sound quality due to the friction touch noise between it and the palm, especially the wireless microphone itself has a sensitive preamplifier, which makes this touch noise more serious and becomes a technical bottleneck. The general wireless microphone has no professional design experience, and in order to reduce the manufacturing cost, it adopts simple circuit, adopts cheap sound head, poor suspension design and cheap tube surface treatment, so the sound quality is unclear and can't overcome the obvious touch noise of the microphone, which deteriorates the original sound. Therefore, when choosing a wireless microphone with good quality, we must pay special attention to the characteristics of extremely clear sound quality and ultra-low touch noise.
5. It has the function of eliminating sound interruption or instability
The signal transmitted by the wireless microphone is attracted and reflected by the surrounding environment, which leads to the phenomenon of dead angle of the signal received by the receiving antenna, and the output sound is interrupted or unstable. In order to solve this shortcoming, the most perfect effect can only be obtained by adopting the most advanced automatic selective receiving system. Generally, the cheap dual-channel receivers popular in the market don't have this automatic selective message receiving function, so they can't avoid the above shortcomings, so they can only be used in short-distance family karaoke occasions. In professional places or users who attach importance to sound quality, they must choose the model of automatic message selection and reception system to meet the requirements of sound quality and get a perfect performance.
6. It has the function of preventing noise and loud noise caused by interference during standby
Most general receivers have a mute control function. When the power supply is turned on and there is no microphone signal input or the signal strength is lower than a certain signal-to-noise ratio, the mute control circuit will turn off the output circuit, and the main receiver will be completely mute to prevent noise output. When the microphone signal is turned on, the receiver immediately starts the mute circuit to let the audio circuit output the sound of the microphone. However, when the microphone power supply is turned on and off, or when the microphone signal is turned off, occasionally signal interference beyond the mute control intensity is encountered, and the receiver mute circuit will also be started to output noisy noise by these impact noises and interference noises. In order to solve this defect, the so-called "audio lock mute circuit" is added to the advanced model to suppress it. Its principle is to add a fixed ultra-audio modulation signal to the transmitted signal of the microphone; at the same time, a discriminator is installed inside the receiver, so that the receiver can only start the output circuit when it receives the microphone signal containing this fixed ultra-audio modulation signal, so as to prevent other signals or noise interference. In order to protect your precious sound system from noise and loud noise, you must choose a model with the function of code locking and mute.
7. With the function of multi-channel non-interference
The biggest technical bottleneck in the use of wireless microphones is the problem of signal interference, especially the more frequencies are used, the more serious the interference problem is. Therefore, in the case of using multiple wireless microphones at the same place at the same time, to avoid interference, in addition to carefully selecting the frequencies that do not interfere with each other and avoiding the interference of adjacent external signals, the receiver should have excellent selectivity, and the emitted and received radiation harmonics should be filtered very cleanly. Generally, the receiver in VHF band can use 12 frequencies at the same time, which is very good.
8. Choose a multi-channel series model whose frequency can be changed by digital locking
The traditional wireless microphone system is designed with a fixed frequency locked by Shi Ying. This model can't change the desired frequency at will when it needs multi-channel use or encounters strong signal interference, but must be replaced as a whole. In order to solve this defect, advanced models adopt PLLSynthesized mode, and dozens of frequencies can be pre-stored in the transmitter and receiver for users to change at will. Although this advanced design cost is high, it provides very convenient functions for distributors and users, which completely solves the above defects.
9. Choose products with digital locking UHF channel system
At present, there are too many wireless microphones in VHF2MHz band, resulting in more and more serious problems of signal interference and noise interference of various electrical appliances. Therefore, the frequency of professional wireless microphones has been gradually increased to 8MHz band recently, and PLL phase locking circuit is adopted, with the design that multiple channels can be switched at will, so as to avoid the interference of other signals and noise of general electrical appliances and obtain the best use effect. Because the circuit design of UHF band is more complicated and the high-frequency parts used are more precise, the current price is still on the high side, and there are fewer mass-produced manufacturers. However, UHF models are the best choice for professional quality and gradually become a popular trend in the future.
1. Products with international quality certification and passed the inspection of telecommunication regulations
Excellent wireless microphone products must be manufactured by factories with international quality certification, and must also pass the certification of radio wave regulations in various countries before they can be legally sold and used. Consumers should choose certified products to use, and the quality can be guaranteed.