U.S. Patent 6,506,148 (Loos)
NERVOUS SYSTEM MANIPULATION BY
ELECTROMAGNETIC FELDS FROM
MONITORS
How did you know?
The ideal square wave contains only components of odd-integer harmonic frequencies (of the form 2π(2k − 1)f).
Didn't the Continuous Quality Improvement movement arise in Japan actually, within the auto industry? Was subsequently grafted into corporate culture in America.
I'm sure MOT would have been making mil radios and comms componentry in the 1980s. They were a leading semiconductor mfgr also and are still heavily involved in radio technology.
Certainly. Do you want anons to go into a tutorial for other anons on what are harmonics and what is interference? I had hoped that was not necessary.
Analog data representations have been almost entirely replaced by digital ones. This is true data as transmitted on wires, fibers, wirelessly, to/from satellite, etc.
Digital transmissions consist of representations of square waves.
Maybe a quick refresher on Quadrature Amplitude Modulation:
https://en.wikipedia.org/wiki/Quadrature_amplitude_modulation
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme. The two carrier waves of the same frequency are out of phase with each other by 90°, a condition known as orthogonality or quadrature. The transmitted signal is created by adding the two carrier waves together. At the receiver, the two waves can be coherently separated (demodulated) because of their orthogonality property. Another key property is that the modulations are low-frequency/low-bandwidth waveforms compared to the carrier frequency, which is known as the narrowband assumption.
Phase modulation (analog PM) and phase-shift keying (digital PSK) can be regarded as a special case of QAM, where the amplitude of the transmitted signal is a constant, but its phase varies. This can also be extended to frequency modulation (FM) and frequency-shift keying (FSK), for these can be regarded as a special case of phase modulation.
QAM is used extensively as a modulation scheme for digital telecommunication systems, such as in 802.11 Wi-Fi standards. Arbitrarily high spectral efficiencies can be achieved with QAM by setting a suitable constellation size, limited only by the noise level and linearity of the communications channel.[1] QAM is being used in optical fiber systems as bit rates increase; QAM16 and QAM64 can be optically emulated with a 3-path interferometer.
Of course not.
Planned obsolescence has been a "feature" of consumer products for as long as I can recall. It is especially noticeable in electronics. It is profitable for product makers and arises from the way a product innovation and development cycle works. By controlling the system of rewards (appraisals, promotions, salary increases, bonuses, etc.), those who manage such enterprises are able to cause this kind of behavior among the engineering and marketing staff.
<Opinion on>
It is disgusting that modern cultures have trained everyone to be a "consumer" who "needs" to have the "latest product" and willingly discards the prior-generation product into the landfill. The waste and chasing after material goods is absolutely repugnant. The system is profitable and creates a constant economic stream all the way from producers of basic materials (e.g. miners) to manufacturing to wholesale and retail to the consumer to waste management. Not to mention taxation, accountants, advertising, and the need to have a "job" to produce "income" so that a person can continue buying more and more of the short-lifespan throwaway goods. And it is all so UNNECESSARY! Good products COULD be designed and made that would last a long, long time. It is shameful that our culture has degenerated to such a degree.
But it was done on PURPOSE to CONTROL US.
Not every anon falls for the "be a consumer" fallacy. Some have lived frugally and purposefully.
What is meant by a 'Harmonic'?
Maybe I can explain it simply. I'll try.
Anons have seen and touched a guitar?
In standard tuning, the fattest (lowest) guitar string is tuned to a note called E2,
with a which has a frequency of 82.4 Hz.
82.4 vibrations per second. (E2 means the second E up from the bottom of a piano keyboard).
Let's say the vibrating portion of the string is about 30 inches.
If you lightly touch the string halfway between top and bottom, the string no longer vibrates at 82.4 Hz. Instead each half vibrates twice as fast at 164.8 Hz. The note is E3. The note sounds 1 octave higher. This note is called the FIRST HARMONIC. (Look at the diagram.).
If you lightly touch the string 1/3 of the distance – in our example 10" from the top of bottom – it will now vibrate at 3x the fundamental frequency and will sound 1 octave + 1 fifth higher. The new note will be B4.
And so forth.
The same principle applies to any kind of a vibration, whether an acoustic vibration in this example, or an electromagnetic wave like a radio wave or data transmission over Wifi or whatever. The mathematical relationship between the fundamental frequency and 2x, 3x, 4x, etc. times the frequency holds true for all kinds of vibrations.
ttps://en.wikipedia.org/wiki/Harmonic
A harmonic is any member of the harmonic series. The term is employed in various disciplines, including music, physics, acoustics, electronic power transmission, radio technology, and other fields. It is typically applied to repeating signals, such as sinusoidal waves. A harmonic of such a wave is a wave with a frequency that is a positive integer multiple of the frequency of the original wave, known as the fundamental frequency. The original wave is also called the 1st harmonic, the following harmonics are known as higher harmonics. As all harmonics are periodic at the fundamental frequency, the sum of harmonics is also periodic at that frequency. For example, if the fundamental frequency is 50 Hz, a common AC power supply frequency, the frequencies of the first three higher harmonics are 100 Hz (2nd harmonic), 150 Hz (3rd harmonic), 200 Hz (4th harmonic) and any addition of waves with these frequencies is periodic at 50 Hz.
What is meant by
Interference of Waves?
Here's a nice little tutorial explaining it.
https://www.physicsclassroom.com/class/waves/Lesson-3/Interference-of-Waves