Wireless microphones (commonly known as "universal microphones") have become core audio equipment in professional performances, conference teaching, film and television recording due to flexibility and portability. Two major technical camps—UHF (Ultra High Frequency) and 2.4G—dominate, each with distinct focuses in principles, transmission characteristics, and application scenarios, adapting to different professional needs.
2.4G wireless microphones work in 2.405-2480MHz ISM band, based on digital modulation (e.g., FSK, QPSK). Core principle: audio signals are converted to digital via ADC module, encoded and encrypted, then transmitted via intelligent frequency hopping to select the least interfering channel, decoded at the receiver. No frequency authorization is required, supporting automatic pairing with low usage threshold.
2.4G core advantages are pure sound quality and easy deployment. Digital transmission ensures high fidelity, with dynamic range generally over 85dB; some models support 32kHz+ sampling rate for accurate human voice reproduction. It features automatic frequency selection and intelligent hopping to avoid interference, plug-and-play without complex planning. However, band congestion limits transmission distance to 30-70 meters in open environments, with significant performance attenuation in occluded areas.
2.4G wireless microphones focus on small-to-medium scenarios and convenience: multimedia classrooms and small conference rooms for teaching and speeches; mobile scenarios like film shooting and live interviews—lightweight design and low latency (usually within 10ms) achieve audio-visual synchronization. They are also widely used in non-professional scenarios such as home entertainment and small speeches, balancing cost-effectiveness and experience.
UHF and 2.4G wireless microphones are complementary. Selection depends on scenario scale, transmission distance, interference environment, and sound quality needs: UHF for large professional scenarios to ensure stability; 2.4G for small-to-medium convenient scenarios to improve efficiency. Technological iteration narrows the gap in sound quality and anti-interference, enabling more precise adaptation to segmented scenario needs in the future.
It is worth noting that our brand SHUPU is actively engaged in technological research and development, aiming to significantly optimize the transmission distance and stability of 2.4G wireless microphones and further break through their application limitations.
