The clarity of a walkie-talkie call is a standard for us to evaluate the quality of the walkie-talkie, and the sound quality of the walkie-talkie mainly depends on the speaker of the walkie-talkie. The audio power generated by the walkie-talkie uses electromagnetic, piezoelectric, or electrostatic effects to vibrate the speaker cone or diaphragm and resonate (resonate) with the surrounding air to produce sound.
Impedance is the impedance value of the walkie-talkie speakers appearing at both ends of the voice coil at a specific operating frequency. The impedance values of walkie-talkie speakers are mainly 4, 5, 6, 8, 16, 32 ohms, etc. When the speaker operates at this impedance value, max high power can be obtained.
The extra power of the walkie-talkie speaker refers to the normal working power of the speaker. When the horn works for a long time, only under this condition can it be guaranteed not to be damaged. This involves a max input peak power, that is, the max high power that the speaker can withstand. When a constant voltage is applied to the input of the walkie-talkie speaker, the sound pressure level at a certain point on the axis of the speaker will vary with frequency.
Therefore, when we are purchasing walkie-talkies, if we want to get a clearer, louder, and brilliant-quality communication experience, we must pay attention to whether the quality of the speakers configured on the walkie-talkie is good enough.
The above is not the only way to determine the quality of the walkie-talkie with regard to the sound quality of the walkie-talkie, but also depends on other factors of the walkie-talkie, such as the sensitivity of the walkie-talkie, the selection of all the accessories of the product manufacturer, and so on. Of course, the sound quality of the walkie-talkie mainly depends on the pre-emphasis and de-emphasis circuits. At present, there is a more advanced voice processing circuit "application of voice companding circuit and low-level expansion circuit", which has a good effect on fidelity voice.