A wireless microphone and/or in-ear monitoring system, comprising at least one first mobile device (MT), in particular a wireless microphone, for wirelessly transmitting first audio signals (UL) and/or for wirelessly receiving second audio signals (DL), a second mobile device (MT), and at least one base station (BS) for wirelessly receiving first audio signals (UL) transmitted by the first mobile device (MT) and/or for wirelessly transmitting the second audio signals (DL) to the first and/or the second mobile device (MT), wherein the wireless transmission is based on an Orthogonal Frequency-Division Multiplex OFDM Time-Division Multiple Access TDMA transmission, wherein each mobile device (MT) transmits first audio signals (UL) or receives second audio signals (DL) at least once in 2 ms, wherein the TDMA transmission takes place in TDMA frames , and each TDMA frame comprises a plurality of slots, wherein the mobile devices (MT) are configured to send and receive the first or second audio signals within individual slots of the TDMA frames, wherein the at least one base station (BS) is configured to send a known beacon symbol to the mobile devices (MT) in a beacon slot (B), wherein the beacon slot (B) is the first slot of a TDMA frame and constitutes a downlink slot, wherein the mobile devices (MT) are configured to analyze the beacon symbol for the OFDM transmission so that the OFDM transmission of the respective mobile devices are based on the reception of the beacon symbols, and wherein each slot comprises precisely one OFDM symbol , wherein the mobile devices (MT) use the beacon symbol for determining Automatic Gain Control (AGC), for determining a time synchronization and/or for determining a Carrier Frequency Offset (CFO). at least one first mobile device (MT), in particular a wireless microphone, for wirelessly transmitting first audio signals (UL) and/or for wirelessly receiving second audio signals (DL), a second mobile device (MT), and at least one base station (BS) for wirelessly receiving first audio signals (UL) transmitted by the first mobile device (MT) and/or for wirelessly transmitting the second audio signals (DL) to the first and/or the second mobile device (MT), wherein the wireless transmission is based on an Orthogonal Frequency-Division Multiplex OFDM Time-Division Multiple Access TDMA transmission, wherein each mobile device (MT) transmits first audio signals (UL) or receives second audio signals (DL) at least once in 2 ms, wherein the TDMA transmission takes place in TDMA frames , and each TDMA frame comprises a plurality of slots, wherein the mobile devices (MT) are configured to send and receive the first or second audio signals within individual slots of the TDMA frames, wherein the at least one base station (BS) is configured to send a known beacon symbol to the mobile devices (MT) in a beacon slot (B), wherein the beacon slot (B) is the first slot of a TDMA frame and constitutes a downlink slot, wherein the mobile devices (MT) are configured to analyze the beacon symbol for the OFDM transmission so that the OFDM transmission of the respective mobile devices are based on the reception of the beacon symbols, and wherein each slot comprises precisely one OFDM symbol , wherein the mobile devices (MT) use the beacon symbol for determining Automatic Gain Control (AGC), for determining a time synchronization and/or for determining a Carrier Frequency Offset (CFO). <EOS>