Post by Deleted on May 11, 2018 13:50:28 GMT
Things That Stimulate Thought
Wave lengths are interesting things.
In antenna design it is well known that electrical wavelength is a large factor in the design of an antenna.
By comparison, acoustic wavelengths are related, yet governed by different realities...
The acoustic wavelength of the lowest audible frequency is on the order of several miles!
So far I've only said about 50 words yet have gotten us deep into mind bending territory.
Let's go back and begin again...
Wavelengths in radio are measurements in a vacuum, even when applied in the atmosphere on earth, because air is transparent to RF.
By comparison, acoustic frequencies, those of audible sound, are entirely dependent on air, altered by the density of air, and have a completely different measurement scale than electronic wavelengths.
Most curiously, the lowest frequencies can occur both acoustically and electronically at the same time without interfering with one other! Take for example 60-Hertz, which is broadcast from a radio antenna by the National Bureau of Standards as a time base for far-flung clocks.
Without causing the least interference to clocks a 60-Hz audio tone can be generated by a loudspeaker at the speed of sound traveling in the same general space as the RF signal traveling at the speed of light.
This all makes me wonder why it is that we can reproduce low audio frequencies from a loudspeaker that is magnitudes smaller than the full wavelengths of the lowest audio range, yet efficiency from broadcast antennas requires structures that are full or multiple lengths of the full electronic wavelengths of the frequencies being generated.
It seems to me that the quest for smaller transmitting antennas for lengthy wavelengths is unfinished work awaiting the future inventor!
No one stands to benefit from smaller antennas more than hobbyists working under part 15 and like rules, where small antennas are not a choice but a dictate.
At the heart of this exploration the ALPB works around the clock in laboratories found in basements, attics, garages, and tool sheds anywhere and everywhere.
These are men dedicated to the ultimate dream of solving the last big question in micro radio.
Music up and out.
Wave lengths are interesting things.
In antenna design it is well known that electrical wavelength is a large factor in the design of an antenna.
By comparison, acoustic wavelengths are related, yet governed by different realities...
The acoustic wavelength of the lowest audible frequency is on the order of several miles!
So far I've only said about 50 words yet have gotten us deep into mind bending territory.
Let's go back and begin again...
Wavelengths in radio are measurements in a vacuum, even when applied in the atmosphere on earth, because air is transparent to RF.
By comparison, acoustic frequencies, those of audible sound, are entirely dependent on air, altered by the density of air, and have a completely different measurement scale than electronic wavelengths.
Most curiously, the lowest frequencies can occur both acoustically and electronically at the same time without interfering with one other! Take for example 60-Hertz, which is broadcast from a radio antenna by the National Bureau of Standards as a time base for far-flung clocks.
Without causing the least interference to clocks a 60-Hz audio tone can be generated by a loudspeaker at the speed of sound traveling in the same general space as the RF signal traveling at the speed of light.
This all makes me wonder why it is that we can reproduce low audio frequencies from a loudspeaker that is magnitudes smaller than the full wavelengths of the lowest audio range, yet efficiency from broadcast antennas requires structures that are full or multiple lengths of the full electronic wavelengths of the frequencies being generated.
It seems to me that the quest for smaller transmitting antennas for lengthy wavelengths is unfinished work awaiting the future inventor!
No one stands to benefit from smaller antennas more than hobbyists working under part 15 and like rules, where small antennas are not a choice but a dictate.
At the heart of this exploration the ALPB works around the clock in laboratories found in basements, attics, garages, and tool sheds anywhere and everywhere.
These are men dedicated to the ultimate dream of solving the last big question in micro radio.
Music up and out.