The ear buds do emit power. All digital communications at higher data rates use bi-directional communications for data transfer (error correction, confirmation of receipt and synchronization). The maximum power output allowed for the longest range (100 meter) bluetooth Class 1 is +20 dBm or 100mW. The standard Class 2 is 10 meter range with a power output of +4dBm (2.5 mW) and finally Class 3 has only 0dBm (1mW) output with a very short distance of communication about 1 meter. Typical earbuds are going to be Class 2 with 2.5mW output. That is 0.0025 Watts. A very small amount of power that really can't do much damage. The amount of heat it can produce in a water molecule is extremely small. Not really much to worry about. Power emissions lose power with the square of distance, even an inch loses a large amount of power. Fortunately receivers can receive signals at ridiculously small strengths, they don't even measure power at receiver sensitivity levels with watts, they use the logarithmic scale Decibels in relation to one milliwatt. Typical receivers in this frequency range can reliably receive -131dBm and produce a 10dB SINAD value for solid reception. This is 10 to the negative 13th power or 0.00000000000000001 watts. This is why RF has such fantastic range, because of how low a signal can still be demodulated. RF does not travel through water without massive losses that dissipate the energy as heat. The signal bouncing around in the head is a lossy proposition, however by placing a wireless transmitter under your chin, you can actually focus the energy in the direction of your mouth. It is actually kinda neat that your can create a directional antenna with your head. Not ideal and not very efficient, but it works in a pinch.
I am saving this! Thank you. This puts my mind at ease as I have several friends who are blutoothed up all the time (Apple watches, earbuds, mouses and keyboards, speakers, you name it)
The ear buds do emit power. All digital communications at higher data rates use bi-directional communications for data transfer (error correction, confirmation of receipt and synchronization). The maximum power output allowed for the longest range (100 meter) bluetooth Class 1 is +20 dBm or 100mW. The standard Class 2 is 10 meter range with a power output of +4dBm (2.5 mW) and finally Class 3 has only 0dBm (1mW) output with a very short distance of communication about 1 meter. Typical earbuds are going to be Class 2 with 2.5mW output. That is 0.0025 Watts. A very small amount of power that really can't do much damage. The amount of heat it can produce in a water molecule is extremely small. Not really much to worry about. Power emissions lose power with the square of distance, even an inch loses a large amount of power. Fortunately receivers can receive signals at ridiculously small strengths, they don't even measure power at receiver sensitivity levels with watts, they use the logarithmic scale Decibels in relation to one milliwatt. Typical receivers in this frequency range can reliably receive -131dBm and produce a 10dB SINAD value for solid reception. This is 10 to the negative 13th power or 0.00000000000000001 watts. This is why RF has such fantastic range, because of how low a signal can still be demodulated. RF does not travel through water without massive losses that dissipate the energy as heat. The signal bouncing around in the head is a lossy proposition, however by placing a wireless transmitter under your chin, you can actually focus the energy in the direction of your mouth. It is actually kinda neat that your can create a directional antenna with your head. Not ideal and not very efficient, but it works in a pinch.
I am saving this! Thank you. This puts my mind at ease as I have several friends who are blutoothed up all the time (Apple watches, earbuds, mouses and keyboards, speakers, you name it)