Ultrasonic sound detection method depends on a high-frequency sound created because of the movement of gas from one pressure to another; the orifice where the gas escapes normally produces 40 KHz and higher.
Try to imagine how humans create sound or voice; the air that escapes or pass through the vocal box, which is a hole enables the humans to produce sounds by letting the air pushes through that hole (vocal box). This phenomenon is similar to having leaks in refrigerants. With electronic sound detector, the leak can be pinpointed or determined.
The greater the pressure inside the gas container or refrigerants, the greater noise there would be because the gas pressure is directly proportional to the turbulence created. The noise is almost inaudible to human ears, much like the whistle of a dog which is at a very high frequency. Hence the detector is named “ultrasonic.” With their highly sensitive microphones, ultrasonic sound detectors are the only ones that can hear such almost inaudible sound.
The same situation also happens in vacuum; the vessel or evacuated system is where the gas rushes into, creating a high frequency sound. However, the only difference is that the noise or sound is generated inside the system, not like in a refrigerant or a gas container in which the noise is generated outside the system.
Continue reading here: “The Good and Bad about Electronic Sound Detection Method”
Try to imagine how humans create sound or voice; the air that escapes or pass through the vocal box, which is a hole enables the humans to produce sounds by letting the air pushes through that hole (vocal box). This phenomenon is similar to having leaks in refrigerants. With electronic sound detector, the leak can be pinpointed or determined.
The greater the pressure inside the gas container or refrigerants, the greater noise there would be because the gas pressure is directly proportional to the turbulence created. The noise is almost inaudible to human ears, much like the whistle of a dog which is at a very high frequency. Hence the detector is named “ultrasonic.” With their highly sensitive microphones, ultrasonic sound detectors are the only ones that can hear such almost inaudible sound.
The same situation also happens in vacuum; the vessel or evacuated system is where the gas rushes into, creating a high frequency sound. However, the only difference is that the noise or sound is generated inside the system, not like in a refrigerant or a gas container in which the noise is generated outside the system.
Continue reading here: “The Good and Bad about Electronic Sound Detection Method”
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