Basic instructions for using a microphone

2019-01-21 10:58:26 admin

 The choice of microphone should be based on the occasion of use and sound quality requirements, combined with the characteristics of a variety of microphone, comprehensive consideration.For example, for high-quality recording and broadcasting, sound quality is mainly required. Capacitance microphone, aluminum band microphone or advanced moving-coil microphone, such as settune's srm-27 recording microphone, should be selected.For general amplification, choose ordinary moving coil type, such as haotian sdm-109 wired microphone;When the speaker position from time to time to move or speech with the larger distance from the amplifier, such as karaoke singing, should choose a single direction, low sensitivity of the microphone, such as settune swm-h970 wireless microphone, to reduce noise interference.Meeting pseudo-high quality sound pickup, good sound quality, can choose a capacitor microphone such as settune swm-2104 wireless conference microphone.The use of capacitive microphone requires phantom power supply. Generally, the supply voltage is specified in the technical parameters of the microphone. The phantom power supply with appropriate voltage should be selected.

 

In use, attention should also be paid to:

 

1. Impedance matching

 

When using a microphone, the output impedance of the microphone is the same as the input impedance of the amplifier, which is the best match. If the mismatch ratio is more than 3:1, the transmission effect will be affected.For example take 50 Ω microphone and the input impedance of 150 Ω amplifier, although nearly 7 db can increase output, but the sound of the high frequency will be obvious. 

 

2. Connecting wires

 

Microphone output voltage is very low, in order to avoid loss and interference, the connection line must be as short as possible, high quality microphone should choose double core twisted metal shielding wire, general microphone can use a single core metal shielding wire.High impedance microphone transmission line length should not exceed 5 meters, otherwise the treble will be significantly lost.The connection line of the low-resistance microphone can be extended to 30m--50m. 

 

3. Working distance and proximity effect

 

Generally, the working distance between the microphone and the mouth should be between 30cm and 40cm.Too close working distance will cause distortion due to too strong signal, and too heavy low-frequency sound will affect the clarity of language.This is because the directional microphone has a "near speech effect", that is, when broadcasting at close range, the low-frequency sound will be significantly improved.Sometimes, however, singers deliberately use the phrase "near speech?"Make the singing effect more beautiful and pleasant. 

 

4. Angle between sound source and microphone

 

Each microphone has its effective Angle, and the general sound source should be aimed at the Central Line of the microphone. The greater the Angle between the two, the greater the loss of treble.Sometimes when using a microphone, the "ing" sound comes from the microphone. 

 

5. Microphone location and height

 

When amplifying, do not place the microphone close to or aim it at the speaker. 

 

The height of the microphone should be determined according to the height of the sound source. If one person speaks or several people sing, the height of the microphone should be consistent with the singer's mouth.When there are a large number of people, the microphone should be placed at an average height, and the singer and accompaniment as well as the positions of various Musical Instruments in the team should be appropriately allocated. The sound should not be too loud or too light, and all sounds should be within the effective Angle of the microphone.If there is a lead singer or leader, a special microphone should be placed when necessary. 

 

When several microphones need to be used at the same time, the method of parallel connection can be adopted, but the phase problem of several microphones must be paid attention to.Only when the phase is consistent can they be parallel with each other, otherwise they will interfere with each other, so that the output is reduced, distortion.Different types of microphones with different impedance should not be used in parallel, because the high impedance microphones "short circuit", so that the output voltage is very low.In general, the direct parallel use of microphones is not as effective as a single microphone. 

 

If several microphones are used by one person at a time, rather than several separate places for different purposes, it is advisable to choose the same type of microphone.Otherwise, the pitch of the speech will change as the speaker moves or changes Angle.

 

Microphones should be used to prevent knocking or falling.It is not advisable to test the microphone by blowing or tapping, otherwise it is easy to damage the microphone. 

 

When using a microphone outdoors or recording a voice, use a windshield to avoid recording the "poop-poop" of the wind.The windshield also protects the microphone from dust. 

 

When using a wireless microphone:

 

(1) select the location of the receiver to avoid the "dead point". 

 

(2) when receiving, adjust the Angle of receiving antenna, adjust the frequency, and adjust the volume to make it in the best state. 

 

(3) the antenna of the wireless microphone should hang down naturally to expose the outside of the garment. 

 

(4) prevent reverse polarity connection of the battery. Remove the battery after use. 

 

Some microphones (electret capacitors, wireless microphones) are battery-powered.If the voltage drops, the sensitivity decreases and the distortion increases.So when the sound goes bad, check the battery voltage and turn off the power when the microphone is not in useThe choice of microphone should be based on the occasion of use and sound quality requirements, combined with the characteristics of a variety of microphone, comprehensive consideration.For example, for high-quality recording and broadcasting, sound quality is mainly required. Capacitance microphone, aluminum band microphone or advanced moving-coil microphone, such as settune's srm-27 recording microphone, should be selected.For general amplification, choose ordinary moving coil type, such as haotian sdm-109 wired microphone;When the speaker position from time to time to move or speech with the larger distance from the amplifier, such as karaoke singing, should choose a single direction, low sensitivity of the microphone, such as settune swm-h970 wireless microphone, to reduce noise interference.Meeting pseudo-high quality sound pickup, good sound quality, can choose a capacitor microphone such as settune swm-2104 wireless conference microphone.The use of capacitive microphone requires phantom power supply. Generally, the supply voltage is specified in the technical parameters of the microphone. The phantom power supply with appropriate voltage should be selected.

 

In use, attention should also be paid to:

 

1. Impedance matching

 

When using a microphone, the output impedance of the microphone is the same as the input impedance of the amplifier, which is the best match. If the mismatch ratio is more than 3:1, the transmission effect will be affected.For example take 50 Ω microphone and the input impedance of 150 Ω amplifier, although nearly 7 db can increase output, but the sound of the high frequency will be obvious. 

 

2. Connecting wires

 

Microphone output voltage is very low, in order to avoid loss and interference, the connection line must be as short as possible, high quality microphone should choose double core twisted metal shielding wire, general microphone can use a single core metal shielding wire.High impedance microphone transmission line length should not exceed 5 meters, otherwise the treble will be significantly lost.The connection line of the low-resistance microphone can be extended to 30m--50m. 

 

3. Working distance and proximity effect

 

Generally, the working distance between the microphone and the mouth should be between 30cm and 40cm.Too close working distance will cause distortion due to too strong signal, and too heavy low-frequency sound will affect the clarity of language.This is because the directional microphone has a "near speech effect", that is, when broadcasting at close range, the low-frequency sound will be significantly improved.Sometimes, however, singers deliberately use the phrase "near speech?"Make the singing effect more beautiful and pleasant. 

 

4. Angle between sound source and microphone

 

Each microphone has its effective Angle, and the general sound source should be aimed at the Central Line of the microphone. The greater the Angle between the two, the greater the loss of treble.Sometimes when using a microphone, the "ing" sound comes from the microphone. 

 

5. Microphone location and height

 

When amplifying, do not place the microphone close to or aim it at the speaker. 

 

The height of the microphone should be determined according to the height of the sound source. If one person speaks or several people sing, the height of the microphone should be consistent with the singer's mouth.When there are a large number of people, the microphone should be placed at an average height, and the singer and accompaniment as well as the positions of various Musical Instruments in the team should be appropriately allocated. The sound should not be too loud or too light, and all sounds should be within the effective Angle of the microphone.If there is a lead singer or leader, a special microphone should be placed when necessary. 

 

When several microphones need to be used at the same time, the method of parallel connection can be adopted, but the phase problem of several microphones must be paid attention to.Only when the phase is consistent can they be parallel with each other, otherwise they will interfere with each other, so that the output is reduced, distortion.Different types of microphones with different impedance should not be used in parallel, because the high impedance microphones "short circuit", so that the output voltage is very low.In general, the direct parallel use of microphones is not as effective as a single microphone. 

 

If several microphones are used by one person at a time, rather than several separate places for different purposes, it is advisable to choose the same type of microphone.Otherwise, the pitch of the speech will change as the speaker moves or changes Angle.

 

Microphones should be used to prevent knocking or falling.It is not advisable to test the microphone by blowing or tapping, otherwise it is easy to damage the microphone. 

 

When using a microphone outdoors or recording a voice, use a windshield to avoid recording the "poop-poop" of the wind.The windshield also protects the microphone from dust. 

 

When using a wireless microphone:

 

(1) select the location of the receiver to avoid the "dead point". 

 

(2) when receiving, adjust the Angle of receiving antenna, adjust the frequency, and adjust the volume to make it in the best state. 

 

(3) the antenna of the wireless microphone should hang down naturally to expose the outside of the garment. 

 

(4) prevent reverse polarity connection of the battery. Remove the battery after use. 

 

Some microphones (electret capacitors, wireless microphones) are battery-powered.If the voltage drops, the sensitivity decreases and the distortion increases.So when the sound goes bad, check the battery voltage and turn off the power when the microphone is not in use