There is always so much confusion about electromagnetic energy. This is my particular field, so please let me help people get a bit of actual real information. Human audio range is between 20 Hz to 20 kHz. This frequency range falls within the range of ELF/ULF/And VLF. The frequency ranges are as follows: ELF 3Hz-300Hz, ULF 300Hz-3kHz, VLF 3kHz-30kHz, LF 30kHz-300kHz, MF 300 kHz-3MHz, HF 3MHz-30MHz, VHF 30MHz-300MHz, UHF 300 MHz-3GHz, SHF 3GHz-30 GHz, EHF 30GHz-300GHz. We do not have anything that exceeds very far into the EHF band. Most satellite communications is typically between 300 MHz to a maximum of about 40GHz. All of this on the Electromagnetic scale is non-ionizing radiation. Ionizing radiation does not begin until Ultraviolet light. The UV frequency range is between 7.5 x 10 to the 14th power to 3 x 10 to the 16th power. This is substantially beyond the Radio Frequency ranges that we use. Although there are health affects to the RF ranges (some positive and some negative) low field strengths can cause damage to cellular function, however it does not damage DNA ionic bonds. This is why it is classified as non-ionizing radiation. Cells damaged by RF or any other cause is dealt with within the body by a natural process of recycling. It is not advisable to continue causing cellular damage beyond what the recycling system can cope with, this leads to other health complications. All this being said, this does not cause mutated cells with the ability to create additional mutated daughter cells. This is what we would classify as malignant cells. Radio Frequency does not cause cancer, but it can have adverse health effects in high levels. I hope this clears up any misconceptions that folks may have.
This is the stuff I've been waiting for. Thank you!
So based on what you said, the 2.4GHz UHF blutooth airbuds don't damage DNA's ionic bonds, but may still damage cells or cause other disturbances within the body, so it's best not to, say, wear them 12hrs a day? And to be 100% safe, wired earbuds would be the way to go as the energy would be contained within the wires from source to endpoint (the speakers inside the buds)?
The bluetooth power is extremely low, damage would be minimum, but there would still be some damage, whether or not it is enough to cause actual damage is up to debate. Earbuds use nothing but audio frequency. The frequencies would be between 20Hz to 20kHz, so simply audio frequencies, no damage at all, unless you play your music too loud 😁
I see. So the power used to link them to your phone is simply a sort of "passive" power that listens for the signal your phone emits (audio data stream I assume) + the power to the actual speakers inside them (internal power, not emitting)?
edit- what about the beam-forming aspect? Like, would the phone's emission not be directed and bounced in your brain or something?
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.
There is always so much confusion about electromagnetic energy. This is my particular field, so please let me help people get a bit of actual real information. Human audio range is between 20 Hz to 20 kHz. This frequency range falls within the range of ELF/ULF/And VLF. The frequency ranges are as follows: ELF 3Hz-300Hz, ULF 300Hz-3kHz, VLF 3kHz-30kHz, LF 30kHz-300kHz, MF 300 kHz-3MHz, HF 3MHz-30MHz, VHF 30MHz-300MHz, UHF 300 MHz-3GHz, SHF 3GHz-30 GHz, EHF 30GHz-300GHz. We do not have anything that exceeds very far into the EHF band. Most satellite communications is typically between 300 MHz to a maximum of about 40GHz. All of this on the Electromagnetic scale is non-ionizing radiation. Ionizing radiation does not begin until Ultraviolet light. The UV frequency range is between 7.5 x 10 to the 14th power to 3 x 10 to the 16th power. This is substantially beyond the Radio Frequency ranges that we use. Although there are health affects to the RF ranges (some positive and some negative) low field strengths can cause damage to cellular function, however it does not damage DNA ionic bonds. This is why it is classified as non-ionizing radiation. Cells damaged by RF or any other cause is dealt with within the body by a natural process of recycling. It is not advisable to continue causing cellular damage beyond what the recycling system can cope with, this leads to other health complications. All this being said, this does not cause mutated cells with the ability to create additional mutated daughter cells. This is what we would classify as malignant cells. Radio Frequency does not cause cancer, but it can have adverse health effects in high levels. I hope this clears up any misconceptions that folks may have.
This is the stuff I've been waiting for. Thank you!
So based on what you said, the 2.4GHz UHF blutooth airbuds don't damage DNA's ionic bonds, but may still damage cells or cause other disturbances within the body, so it's best not to, say, wear them 12hrs a day? And to be 100% safe, wired earbuds would be the way to go as the energy would be contained within the wires from source to endpoint (the speakers inside the buds)?
The bluetooth power is extremely low, damage would be minimum, but there would still be some damage, whether or not it is enough to cause actual damage is up to debate. Earbuds use nothing but audio frequency. The frequencies would be between 20Hz to 20kHz, so simply audio frequencies, no damage at all, unless you play your music too loud 😁
I see. So the power used to link them to your phone is simply a sort of "passive" power that listens for the signal your phone emits (audio data stream I assume) + the power to the actual speakers inside them (internal power, not emitting)?
edit- what about the beam-forming aspect? Like, would the phone's emission not be directed and bounced in your brain or something?
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.