Omnidirectional microphones capture sound coming from all directions. Second, there are omnidirectional microphones. Directional microphones focus on capturing sound coming from specific directions. First, there are directional microphones. There are three types of long-distance hearing devices available today. And finally, the data is transmitted over a network to a computer. After amplification, the sound is converted to digital data. Then, amplifiers increase the volume of the captured sound. Microphones capture the sound waves produced by the source. Most long-distance hearing devices work using microphones. Now that you know how sound works, let’s talk about long-distance hearing devices. That means that sound travels faster at night than during the day. The speed of sound increases by 2% per degree Celsius. So, sound travels fastest at lower temperatures. The speed of sound depends upon temperature. Air molecules vibrate because of heat and pressure changes. And since air is primarily transparent, sound travels pretty fast. Sound waves travel through air and water. You can even hear sounds from up to 1 kilometer away. But long-distance hearing devices allow us to hear sounds from much farther than that. Humans generally cannot hear sounds beyond 300 meters. Long-distance hearing devices are used to enhance the ability of humans to detect sounds from far distances.
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