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memang “radiasi”, lebih tepatnya gelombang elektromagnetik dari ponsel (radio frequency). Ponsel memancarkan gelombang ini saat terhubung ke jaringan (data, telepon, WiFi). Jenis radiasi ini termasuk non-ionizing, yaitu berenergi rendah dan tidak cukup kuat untuk merusak sel tubuh seperti radiasi nuklir atau sinar-X. Airplane mode mematikan koneksi jaringan, sehingga pancaran gelombang dari ponsel berkurang. Karena itu, ada anggapan bahwa menggunakan airplane mode saat tidur lebih “aman”. Namun
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Pure Tones • 1000 Hz – Mid-band tone that transmits efficiently through air and biological tissue and stimulates mid-range auditory cortex regions. • 5000 Hz – High-frequency carrier interacting with cranial bone conduction and sinus cavities while supporting upper-band harmonic perception. • 5180 Hz – Upper audible frequency reinforcing skull and sinus resonance zones and detailed pitch discrimination. • 7027 Hz – Very high pitch tone stimulating upper tonotopic auditory cortex regions responsi
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