of the results of calculations conducted in the work [@Gastine] one can easily obtain the eigenfrequencies of a dialectic sphere with the parameters mentioned above. For $\text{TE}_{l1}$ modes with $l=1,2,3$ we have, respectively, the following frequencies: 280 MHz, 420 MHz, and 545 MHz. For $\text{TM}_{l1}$ modes with $l=1,2,3$ the resonance frequencies are 425 MHz, 540 MHz, and 665 MHz. The imaginary parts of these eigenfrequencies are very small so the $Q$ factor in Eq. (\[3-16\]) responsible for radiation is greater than 100.

These eigenfrequencies belong to a new GSM 400 MHz frequency band which is now being standardized by the European Telecommunications Standards Institute. This band was primarily used in Nordic countries, Eastern Europe, and Russia in a first generation of mobile phone system prior to the introduction of GSM.

Due to the Ohmic losses the resonances of a dielectric sphere in question are in fact broad, overlapping and, as the result, they cannot be manifested separately. Indeed, the electric conductance $\sigma$ of the human brain is rather substantial. According to the data presented in Ref. [@WF] $\sigma\simeq 1.0$ S/m. The eigenfrequencies of a dielectric dissipative sphere with allowance for a finite conductance $\sigma $ can be found in the 