Terrestrial Trunked Radio (TETRA) is a worldwide common mobile communication standard, used by authorities and organizations with security tasks. Previous studies reported on health effects of TETRA, with focus on the specific pulse frequency of 17.64 Hz, which affects calcium efflux in neuronal cells. Likewise among others, it was reported that TETRA affects heart rate variability, neurophysiology and leads to headaches. In contrast, other studies conclude that TETRA does not affect calcium efflux of cells and has no effect on people's health.

In the present study we examine whether TETRA short- and long-term exposure could affect the electrophysiology of neuronal in vitro networks. Experiments were performed with a carrier frequency of 395 MHz, a pulse frequency of 17.64 Hz and a differential quaternary phase-shift keying (π/4 DQPSK) modulation. Specific absorption rates (SAR) of 1.17 W/kg and 2.21 W/kg were applied.

In conclusion, the present results do not indicate any effect of TETRA exposure on electrophysiology of neuronal in vitro networks, neither for short-term nor long-term exposure. This applies to the examined parameters spike rate, burst rate, burst duration and network synchrony.

地面干线无线电（TETRA）是一种全球通用的移动通信标准，由负责安全任务的机构和组织使用。先前的研究报道了TETRA对健康的影响，重点是17.64 Hz的特定脉冲频率，这会影响神经元细胞中的钙流出。同样，据报道，TETRA影响心率变异性，神经生理学并导致头痛。相反，其他研究得出结论，TETRA不会影响细胞的钙外流，并且不会影响人们的健康。

在本研究中，我们检查TETRA短期和长期暴露是否会影响神经元体外网络的电生理。实验是在395 MHz的载波频率，17.64 Hz的脉冲频率和差分四元相移键控（π/ 4 DQPSK）调制下进行的。使用了1.17 W / kg和2.21 W / kg的比吸收率（SAR）。

总之，本研究结果并未表明TETRA暴露对短期或长期暴露的神经元体外网络的电生理有任何影响。这适用于检查的参数尖峰速率，突发速率，突发持续时间和网络同步。