The principle and use of karaoke microphone

In recent years, karaoke is popular in all corners of the country, and many audio-visual equipment are equipped with karaoke functions, of which the microphone is an important component. It is very important to understand the principle of the microphone and use the microphone rationally to play a good karaoke function and get good sound effects.

working principle

At present, karaoke microphones widely used in commercial karaoke dance halls and home karaoke systems can be divided into wired karaoke microphones and wireless karaoke microphones.
As the name suggests, the wired karaoke microphone's output signal is sent to the sound reinforcement equipment through a cable. Its structure is shown in Figure 1.

08t01.gif
The commonly used wired karaoke microphones are mainly dynamic coils. Its working principle is: when sound waves act on the microphone diaphragm to make it vibrate, the voice coil adhered to the diaphragm also corresponds in the magnetic circuit air gap The ground vibrates and cuts the magnetic lines of force, generating an induced electromotive force in the voice coil. However, the electromotive force of the microphone output is very low, usually a step-up transformer is connected to the output end of the microphone in order to match with the audio equipment.
Karaoke microphones are used at close range. In order to achieve good results, the microphones are required to have special close-talk effects and pointing effects to improve performance and resist environmental interference. In other words, the sensitivity of the microphone changes with the distance of the sound source at the low frequency end: the closer the distance, the higher the low frequency sensitivity. The high-value karaoke microphone is also equipped with an explosion sound filter, which minimizes excessive breathing noise and popping noise, and realizes complete and full sound reproduction. Another important feature of karaoke microphones is that the microphone shell is equipped with a control switch, which allows you to achieve some special sound effects when singing. Specially designed anti-vibration measures can effectively prevent the friction noise when holding, so that your singing has clear bass, bright high-pitched and sweet, soft and beautiful sound quality, full of infectious.
The domestic famous brand karaoke microphones mainly include Prime series karaoke microphones. This series of microphones is the preferred product for karaoke dance halls and home karaoke systems. The home-use karaoke microphone is represented by the CDK404 in a metal case. It is available in black and silver gray. Its main technical performance is as follows: frequency response is 100Hz ~ 10kHz, output impedance is 600Ω ± 30%, free field sensitivity is -54dB (1kHz), weight is 300g.
The wireless karaoke microphone's cable restricts the free movement space of the singer due to the cable of the wired karaoke microphone, thus affecting the singer's passionate performance and moving range. The wireless karaoke microphone came into being. Figure 2 is a block diagram of the electrical principle of a wireless karaoke microphone.
08t02.gif
The sound head of the wireless karaoke microphone converts the acoustic signal into an electrical signal, and the electrical signal performs frequency modulation on a carrier wave, and the frequency-modulated carrier radio signal is transmitted by the antenna. After the radio signal is received by the FM receiver, the sound signal is restored and sent to the karaoke machine. The transmission frequency of wireless karaoke microphones used in homes is mostly in the range of 88 ~ 108MHz. It is designed to borrow the recorder with FM band as the receiving device of wireless karaoke microphones to save money. The power of the transmitter is not large, about 100mW, so as not to interfere with other electrical equipment. Professional wireless karaoke microphones work in the high-end frequency band (150-216MHz) or ultra-high frequency band (400-470MHz, 900-950MHz) of ultra-high frequency band, and are equipped with a dedicated FM receiver. Wireless karaoke microphones all use frequency modulation, because frequency modulation has the advantages of strong anti-interference, wide frequency characteristics, high fidelity, low noise, and high transmitter efficiency.

Key points for using karaoke microphone

Pay attention to the following points when using a karaoke microphone: (1) The output impedance of the karaoke microphone should match the input impedance of your karaoke machine; (2) When using more than two karaoke microphones, the The phase should be unified; (3) Before use, the volume of the karaoke machine should be adjusted properly to avoid burning the amplifier and speakers at a large volume. (4) Do not cover the net cover with your hands or block the sound hole during use, so as not to affect the performance of the microphone and reduce the singing effect. (5) When storing the microphone, it should be dust-proof, shock-proof, moisture-proof and anti-magnetic.
If the karaoke microphone can be used correctly, the singing effect will be greatly increased. When singing weak sounds, the microphone should be close to the lips, and the sound becomes deep, real and delicate; when singing strong sounds, move the microphone away from the lips, so that the sound becomes loud, rough and not fried.
Karaoke microphones are the entrance to the entire karaoke system. If they are not properly selected, used and installed, their noise and distortion will be input into the karaoke system, which will affect the sound effects of karaoke singing. People often say, "Sickness comes from the mouth." Please pay attention to this when performing karaoke.

Technical area detailed analysis of Doherty power amplifier design load traction principle (top) detailed analysis of Doherty power amplifier design how to improve efficiency (bottom) analysis of voltage follower input and output error analysis Solve the effect of power amplifier on emi

Follow WeChat

Interesting and informative information and technical dry goods

Download Audiophile APP

Create your own personal electronic circle

Follow the audiophile class

Lock the latest course activities and technical live broadcast
Collect People collection
share it:
comment
Publish

related suggestion

Karaoke effect analog VS digital scheme competition

Karaoke effects are mainly divided into two types: analog and digital (DSP). Which one is better than others? Different manufacturers have their own opinions based on their own interests. After all, end users ...

Posted at 2012-08-08 09:56 • 6293 views
Karaoke effects analog to digital competition
Simple and applicable "Karaoke" power amplifier circuit diagram

As shown in Figure 5-120 is the use of TDA2822 features designed playback circuit. It sends the same amount of stereo L and R channels simultaneously and sends them separately ...

Posted at 2010-12-23 14:47 • 5524 views
Simple and applicable "Karaoke" power amplifier circuit diagram
Mini audio karaoke function

The birthplace of karaoke is in Japan. The original text is Karaoke, which means "unaccompaniment ...

Posted at 2010-08-19 09:43 • 1242 views
Mini audio karaoke function
Mobile Karaoke System

Mobile Karaoke System Introduction In today's society full of competition and challenges, people's lives seem increasingly tense and busy ...

Posted at 2009-12-28 10:53 • 435 views
Mobile Karaoke System
Karaoke Vocal Enhancement Circuit

Of course, designing an audio circuit is the business of an electronic engineer, but if the electronic engineer does not learn a little ...

Posted at 2006-04-17 23:25 • 1333 views
Karaoke Vocal Enhancement Circuit
ESTAR sing it to detonate the new entertainment Kara no longer OK

In 2005, "Super Girl Voice" pushed the civilian entertainment movement to the extreme, and the entertainment industry has a promising prospect. At the same time, our netizens ...

Posted at 2006-03-07 20:49 • 221 times read
ESTAR sing it to detonate new entertainment Kara no longer OK
var check_allow = "/d/Api/iscantalk.html"; var add_url = '/ d / article / write /'; function CheckLogin () {now_uid = ''; var ElecfansApi_checklogin = '/ webapi / passport / checklogin'; var logout_url = "{: U ('Login / logout')}"; var logout_url = 'http://bbs.elecfans.com/member.php?mod=logging&action=logout&refer=front'; $ .get (ElecfansApi_checklogin, function (data, textStatus) {if (data! = "") {EchoLoginInfo (data); CheckEmailInfo (data); data = $ .parseJSON (data); now_uid = data.uid; / * var login_content = 'write an article
'+ data.username +'
Quit '; * / var login_content =' write an article
'+ data.username +'
Set exit '; $ (' # login_area '). Html (login_content); var win_width = $ (window) .width (); if (win_width> 1000) {$ ("# mine"). MouseDelay (200) .hover (function () {$ ("# mymenu"). show ();}, function () {$ ("# mymenu"). hide ();});}} else {var content = 'Login Registration'; $ ('# login_area'). html (content); $ (". special-login"). click (function (e) {$ .tActivityLogin (); return false;});}});} $ (function () {// comment ------------------------------- var comment = $ ("# comment"); var comment_input = $ ("# comContent"); // Submit comment click event interaction $ ("# comSubmit2"). on ('click', function () {var content = comment_input.text (); // Empty input box comment_input. html (""). focus (); // Submit data to server $ .ajax ({url: '/plus/arcComment.php', data: {aid: $ ("# webID"). val (), dopost : 'apiPubComment', content: content}, type: 'post', dataType: 'json', success: function (data) {// Data format returned: if (data.status == "successed") {// Build temporary comment DOM var dom = ''; dom + = '
'; dom + =' '; dom + ='
'; dom + ='

'+ data.data.username +' '; dom + ='

'; dom + =' '+ content +' '; dom + =' '; dom + =' just now '; dom + =' '; dom + =' '; // insert a temporary comment to the list $ ("# comment ") .append (dom);} if (data.status ==" failed ") {// alert (data.msg); layer.msg (data.msg);}}}); return false;}); (function () {/ * * Insert single sign-on JS * / var setHost = 'https://passport.elecfans.com'; // Set domain name var script = document.createElement ('script'); script.type = 'text / javascript'; script.src = setHost + '/public/pc/js/t.passport.js'; script.setAttribute ("id", "sso_script"); script.setAttribute ("data-ssoSite", setHost); script.setAttribute ("data-ssoReferer", encodeURIComponent (location.href)); script.setAttribute ("data-ssoSiteid", "11"); var body = document.getElementsByTagName ("body"). item ( 0); body.appendChild (script);}) () / * * It is recommended to modify the style of the article without a picture * * / $ (". Article .thumb"). Each (function () {if ($ (this). find ('img'). attr ('src') == "") {$ (this) .find ('img'). remove (); $ (this) .parent (). css ('padding-left ',' 0px ');}}); / * Baidu share * / window._bd_share_config = {common: {bdText: '', // Custom share content bdDesc: '', // Custom share summary bdUrl: window.location.href, // Custom share URL address bdPic: ''} , share: [{"bdSize": 60, "bdCustomStyle": true}]} with (document) 0 [(getElementsByTagName ('head') [0] || body) .appendChild (createElement ('script')). src = 'http://bdimg.share.baidu.com/static/api/js/share.js?cdnversion=' + ~ (-new Date () / 36e5)]; var add_url = '/ d / article / write / '; // var check_allow = "{: U (' Api / iscantalk ')}"; var check_allow = "/ d / api / iscantalk"; var click_items_length = $ ('. art_click_count '). length; if ( click_items_length> 0) {var id_str = ''; $ ('. art_click_count'). each (function () {id_str + = $ (this) .attr ('data-id') + ',';}) // var url = "{: U ('Api / getclickbyids')}"; var url = "/ d / api / getclickbyids"; var id_data = 'id_str =' + id_str; $ .ajax ({url: url, data: id_data, type: 'post', dataType: 'json', success: function (re) {if (re.list.length> = 1) {var list = re.list; for (var i in list) {var t emp_id = list [i] ['id']; var temp_span = $ (". art_click_count [data-id =" + temp_id + "]") temp_span.html (list [i] ['click']);}} }})} $ ("# comContent"). click (function () {if (now_uid == '') {$ .tActivityLogin (); return false;}}) $ (function () {var follow_wrap = $ ( ".author-collect"); var now_uid = "{$ _super ['uid']}"; var face_src = "{$ _super ['uface']}"; var getFollowNum = $ (". followNum strong"). html (); // Follow $ (window) .on ('click', '.author-collect', function () {if (now_uid == '') {$ .tActivityLogin (); return false;} if ( $ (this) .attr ('id') == 'follow') {$ .post ('/ d / user / follow', {tuid: article_user_id}, function (data) {// Data format returned: if (data.status == "successed") {$ (". followNum strong"). html (++ getFollowNum); follow_wrap.html ('followed'). attr ('id', 'cancelFollow'). css ( 'background', '# 999'); var follow_user = ' '; $ (' # follow_list '). append (follow_user);} if (data.status == "failed") {alert (data.msg);}});} else {// Unfollow if ($ ( this) .attr ('id') == 'cancelFollow') {$ .post ('/ d / user / cancelFollow', {tuid: article_user_id}, function (data) {// Data format returned: if (data .status == "successed") {follow_wrap.html ('Follow'). attr ('id', 'follow'). css ('background', '# f90'); $ (". followNum strong"). html (-getFollowNum); $ ('# follow_list .face'). each (function () {var target_uid = $ (this) .attr ('data-uid'); if (target_uid == now_uid) {$ ( this) .remove ();}})} if (data.status == "failed") {alert (data.msg);}}); return false;}}});});}); / * var myface = "{$ _super ['uid'] | avatar}"; var myname = "{$ _super ['username']}"; var article_id = {$ article ['id']}; var article_user_id = {$ article ['mid']}; // Article author ID $ (function () {<notempty name = "clearnum"> // Reduce the number of reminders var count = parseInt ($ ("# noticeCount"). html ()); count = count-{$ clearnum}; $ ("# noticeCount"). html (count); if ( count

OBD Connectors

We make OBD connector with terminal by ourselves, soldering type and crimping type are both available. Also 12V and 24V type. OBD1, OB2, J1939, J1708, J1962, etc. Also molded by different type, straight type or right-angle type. The OBD connector cables used for Audi, Honda, Toyota, BWM, etc. We have wide range of materials source , also we can support customers to make a customized one to replace the original ones.

Sae J1708 Connector,Sae J1939 Connector,OBD2 Diagnostic Connectors,Diagnostic Connector,Deutsch Diagnostic Connector

ETOP WIREHARNESS LIMITED , https://www.wireharnessetop.com

This entry was posted in on