Carbon microphones are devices with high output levels and low impedance. Plus, they tend to be pretty affordable. Nevertheless, they have a limited frequency response. As dynamic microphones and condenser microphones became more affordable, carbon microphones lost their popularity. Before delving into its features, here’s an interesting fact. Thomas Edison patented the first carbon microphone…
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Fiber-optic microphones are EMI/RFI immune. Electrical, magnetic, electrostatic, or radioactive fields do not impact them. They do not react to these, either. Therefore, their design is ideal for settings where the use of traditional microphones is dangerous or ineffective. For instance, these scenarios include places like industrial turbines and MRI equipment setups. Additionally, Fiber-optic microphones…
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To talk about electret microphones we first need to talk about electret materials. Electret materials have been known for a long time. Some people suggested they were an important component for condenser microphones. Nevertheless, these seemed impractical before the creation of foil electret. And what is a foil electret, you ask? Well, this material involves…
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Laser microphones are devices that detect sound vibrations in a distant object. As this suggests, they can be used to eavesdrop with a minimal chance of exposure. For this reason, they are common within the surveillance industry. These microphones originated from the idea of eliminating distortion from old-style microphones. Laser microphones are still in an…
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Cardioid microphones are just plain old microphones. Its main use is picking up sounds. These sounds have a high gain in both the front and sides, but a low gain from the back. Since the directional sound pickup is somewhat heart-shaped they are called cardioid mics! This type of microphones are very sensitive to sounds…
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Crystal microphones are quite inexpensive and have both high output and high impedance. When a long cable is used, both the high output voltage and the high-frequency responses are altered. Crystal microphones have an output impedance of over 100,000 ohms and an output level that ranges between -48dB and -60dB. Some can produce small emf’s…
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Liquid microphones are not, and never were, the best option for projecting sounds. In this day and age we know they are not the most functional devices for the production of music. Regardless, the history of their creation is worth telling. And it is not only because the physics it involves. It is also because…
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MEMS microphones, short for microelectromechanical systems microphones, are one of the smallest types of microphones. They have an extremely high-performance level and provide good sensitivity, low power consumption, as well as a high SNR. This type of hardware remains steady when performing and has great features regarding temperature. Importantly, the performance after reflow soldering is…
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The LUFS scale is a measurement of loudness units which identify the loudness and true-peak level of audio. LUFS stands for Loudness Units Full Scale. Nevertheless, before it was invented, there were some troubles to correctly indicate this subjective perception of sound. In the following lines I will explain LUFS metering and how it came…
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