The Best Wireless Microphone of 2020

Nick

Hi, how are you? My name is Nick! I am here to help you find the best Wireless Microphone products. With my article I would like to assist you in making the right decision to buy Wireless Microphone. You can rely on my advice, because I have done a lot of research on this topic and I know very well which Wireless Microphones are good. If you have questions, don’t hesitate to leave me a comment and if you liked my article, share it. See you around. Nick.

10 Best Wireless Microphone

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What is a microphone?

A microphone is used to amplify acoustic signals or send them to a sound carrier. In nature we are surrounded by sound of all kinds. Trees roaring in the wind, barking dogs and human voices produce sounds that are normally limited in strength and spread and are lost immediately after generation. The microphone takes on the task of receiving all kinds of sounds and converting them into electrical signals. In this way, key events such as lectures and concerts can be made accessible to a wider audience. Storage on audio carriers or digitisation also allows the preservation of acoustic events.

Best Wireless MicrophoneA microphone picks up the sound waves via a diaphragm. These signals are amplified in the further technical process. After amplification, the tones are either immediately fed back into the speakers or recorded. Often both processes take place at the same time. The demands on microphones have increased and new technologies have replaced old concepts. For many decades, the carbon microphone has been the standard in the film industry and telecommunications. Today it is practically extinct and has been replaced by the electret microphone.

The challenge for manufacturers of microphones is to reproduce the widest possible frequency spectrum and maintain a high dynamic range. Good microphones process soft sounds as well as loud events without distortion or noise.

One of the most difficult tasks is the live recording of a classical orchestra, as the expert listener is able to compare it directly with the original instruments.
The human ear can process sounds in the range of 16 to 20000 Hertz, which is why most microphones cover this frequency range. The sound is transmitted through a medium. Normally this medium is the air. Without a transmission medium such as air or water, no sound is transmitted, so it is silent in space.

Just as waves propagate from a stone thrown into a pond, so too do sound waves propagate from the source of the sound signal. For example, the sound source can be the voice of a human being, which causes the ambient air to vibrate and hits the eardrums of other human beings. The microphone also has a kind of eardrum and accepts the vibrations of the air.

Broadcasting would be conceivable without microphones. Microphones also play an important role in journalism. From daily news to sports coverage – the radio needs microphones in every conceivable area. Some key events of the 20th century have only been burned into people’s memories by the use of microphones.

This includes a live report of the Hindenburg accident in Lakehurst and a sporting event such as the World Cup in 1954, where news events could only be transmitted by telegraph before the microphone was discovered. The rapporteur’s emotions reflected in his voice were ignored.

The microphone also had a great influence on the change from silent film to sound film. The first sound films attracted a great deal of attention as the audience suddenly became aware of the importance of the acoustic component for a comprehensive film experience.

Microphones are so natural for us today that we don’t give much thought to the acoustic receivers that make our everyday and professional lives so much easier. Many microphones are components of another device and are not directly accessible due to their fixed installation. This applies, for example, to mobile phones and telephones. Intercom systems and many alarm systems are also equipped with microphones.

The invention of the microphone changed society and politics. The possibility of being able to address many people at the same time with the microphone was used by social groups and was also abused by dictatorships. Like all tools, the microphone is an instrument that can be used for both good and bad. One of the most impressive speeches he gave over a microphone was the famous speech by Martin Luther King entitled “I have a dream”, which he gave to 250,000 people in Washington. The Shure 55 Unidyne I microphone was used here.

 

How does a microphone work?

A microphone is an acoustic receiver and converts sound waves into electrical signals. Sounds are characterised by variations in sound pressure and different wavelengths. Only a limited frequency range is audible to humans. At a young age, people can hear sounds of up to 20,000 Hertz. By way of comparison, bats can even hear sounds up to 200,000 hertz. The ideal microphone would process the entire audible frequency range of the human being evenly and with high fidelity of sound. For technical reasons, however, this is not possible, so choosing the right microphone is always a search for the best compromise. In addition to sound reproduction, a microphone must meet other requirements depending on its purpose and application. For example, a high degree of robustness, small dimensions, directional characteristics or a wireless connection may be desirable.

The dynamic microphone is regarded as an all-rounder among the microphones. It isolates the sound source from loud ambient noise and adequately reproduces the frequency range of the human voice. For this reason, the dynamic microphone has been the preferred microphone for reports, presentations and events for many years. It does not require any external power supply and also tolerates rough treatment without complaint.

The dynamic microphone works on the principle of electromagnetic induction. At the head of the microphone there is a diaphragm which receives the sound pressure. A plunger coil is connected to the diaphragm and encloses a magnet. When the membrane vibrates, the fluctuating electric field produces a small but minimal voltage.

Therefore, the dynamic microphone does not depend on the supply of a basic voltage to generate an audio signal. Some elaborately designed dynamic microphones use multiple membranes to cover a very wide frequency range.
Due to the high construction costs, however, this is rarely used. Dynamic microphones are tuned to the frequency range of the human voice or the frequency response of specific musical instruments.

Music studios prefer to use condenser microphones. When it comes to the highest sound quality, condenser microphones are unbeatable. These microphones react very sensitively to soft tones and produce the highest fidelity of sound. Condenser microphones require phantom power. This refers to a power supply with direct current, which is normally supplied via the microphone cable. A voltage of 48 volts has become the standard for phantom powering.

The condenser microphone uses two metal plates arranged opposite each other for sound reception. One of these plates acts as a membrane, while the other platelet is immobile. An electrical source supplies voltage that flows through the plates and generates an electrical field.
The electrical source can be a phantom power supply or a battery. When the membrane vibrates, the electrical field and thus the capacitance of the capacitor changes. The electrical output is the audio signal. If the deflection of the sound waves becomes too large, the sensitive metal plates could touch each other and make the microphone unusable. For this reason, the maximum processed amplitude in the recording studio is smaller than that of microphones for the stage.

With condenser microphones, a distinction is made between small diaphragm and large diaphragm microphones. Large diaphragm microphones are all microphones with a diaphragm diameter of more than 2.5 cm. Due to their sensitivity and low self-noise, they are suitable for soft tones but do not respond so well to high frequencies. Preferred application for large diaphragm microphones is the recording of vocals. Small-membrane microphones have a higher self-noise level, but better treble reproduction. Since the small diaphragm is lighter than a large diaphragm micro, it reacts more quickly to the incoming acoustic signal and covers a wider frequency range.

The wide dynamic range makes small diaphragm condenser microphones also susceptible to wind and pop noise. Popp noises occur when talking explosive consonants such as “p” or “t”. The effect can be alleviated in the studio with a pop screen installed at a distance of about 10 cm from the microphone. Outdoors, a voluminous foam body protects the microphone capsule from acoustic and mechanical interference. In strong winds, a cover of fake fur is often put over the microphone. This cat, as it is called by clay men, swirls the incoming wind before hitting the membrane.

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*Last update on 2020-11-04 / Affiliate links(we get a commission when you buy on amazon) / Images from Amazon Product Advertising API