Methods and devices for radio frequency (RF) mitigation proximate the ear
Earpieces and methods of forming earpieces for radio frequency (RF) mitigation are provided. An earpiece is configured to be inserted in an ear canal. The earpiece includes an insertion element and a sealing section disposed on the insertion element and configured to conform to the ear canal. The sealing section is configured to substantially mitigate radio frequency (RF) transmission and to substantially isolate the ear canal from an ambient environment.
1. A earphone comprising:
an Ambient Sound Microphone (ASM), where the ASM is part of the earphone, where the ASM generates a first ASM signal;
a loudspeaker, where the loudspeaker is configured to play audio;
a pump; and
a sealing section, where the sealing section is configured to reduce radio frequency (RF) transmission past the sealing section when compared to a sealing section composed of silicone, where the sealing section is configured to attenuate acoustical waves at 1000 Hz by more than 5 dB, wherein the sealing section further includes:
an expandable element; and
a filler medium which includes a fluid and particles wherein the pump is configured to move the fluid and particles in and out of the expandable element.
2. The earphone according to claim 1 , where the expandable element is attached to a stent and where the expandable element includes: a deformable membrane encompassing a volume.
3. The earphone according to claim 1 , where the particles absorb more than 50% of the incident RF radiation on the particles at a target RF frequency.
4. The earphone according to claim 1 , where the particles reflects more than 50% of the incident RF radiation on the particles at a target RF frequency.
5. The earphone according to claim 3 , where the target RF frequencies lies between 3 kHz and 300 GHz.
6. The earphone according to claim 4 , where the target RF frequencies lies between 3 kHz and 300 GHz.
7. The earphone according to claim 5 , where the membrane forms a constant volume balloon.
8. The earphone according to claim 6 , where the membrane forms a constant volume balloon.
9. The earphone according to claim 5 , where the membrane forms a variable volume balloon.
10. The earphone according to claim 6 , where the membrane forms a variable volume balloon.
11. The earphone according to claim 5 , where the membrane is composed of at least one of silicone, rubber, and polyurethane elastomers.
12. The earphone according to claim 6 , where the membrane is composed of at least one of silicone, rubber, and polyurethane elastomers.
13. The earphone according to claim 5 , where the membrane is composed of an RF absorbing elastomer.
14. The earphone according to claim 6 , where the membrane is composed of an RF reflecting elastomer.
15. The earphone according to claim 1 , where the expandable element is formed of a material having a Shore A value between 5 A and 90 A.
16. The earphone according to claim 2 , where the fluid medium is a silicone fluid, permeable-based polymer, gel, fluorocarbon liquids, ethylene glycol, isopropyl alcohol or a saline solution.
17. The earphone according to claim 1 , where the particles include at least one of ferromagnetic particles, ferrimagnetic particles, or electrically conductive particles.