waveform
Let an agent explain waveforms, relay types, parameters, Fourier analysis and applications from signal processing, audio and medical sources, describe the named waveforms, and distinguish waveforms from waves as physical phenomena, spectra, signals as information and ECG interpretation, which requires clinicians.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain waveforms, relay types, parameters, Fourier analysis and applications from signal processing, audio and medical sources, describe the named waveforms, and distinguish waveforms from waves as physical phenomena, spectra, signals as information and ECG interpretation, which requires clinicians.
The shape of a signal plotted against time, describing how a quantity such as voltage, pressure or displacement varies, including periodic waveforms such as sine, square, triangle and sawtooth waves and non-sinusoidal waveforms analysed as sums of sinusoids by Fourier analysis, used in electronics, acoustics and medicine, as in the ECG waveform with P waves, QRS complexes and T waves, and in sound synthesis, where the supersaw, a stack of detuned sawtooth waves popularised by the Roland JP-8000 synthesiser in 1996, is a characteristic sound.
What it is for: Describing and generating signals.
It can be explain types and parameters; relay Fourier analysis; describe named waveforms; distinguish related concepts.
Distinguishing features
Time-domain shape
Periodic or aperiodic
Harmonic content
Wide applications
What it looks like
Curves and shapes on oscilloscope screens, audio editors and ECG printouts.
Physical character
parameters: amplitude, frequency, period, phase, duty cycle list
Fourier series: Joseph Fourier, 1807-1822 note
Roland JP-8000: 1996 year - supersaw
How it is recognised
Shape of a signal over time
ECG waveform, square wave, periodic waveform, non-sinusoidal waveform, supersaw
Waves are physical propagation; spectra show frequency content; signals carry information; ECG diagnosis needs clinicians
Related models
is a kind of - in registry terms
is analysed by -
includes -
is contrasted with -
In practice
Families and kinds
sine waves
square and pulse waves
triangle and sawtooth waves
complex non-sinusoidal waveforms
physiological waveforms such as ECG
Standards and regulation
IEC standards for power quality waveforms
Medical device standards for ECG equipment
Failure modes and hazards
Interpreting ECG waveforms without clinical training
Aliasing when sampling waveforms
Hearing damage from loud synthesised sound
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a waveform is.
Science.
Definition
Definition.
Definition
Definition.
- What is a waveform, and how does it differ from physical waves, spectra, signals and ECG diagnosis? definition
- Is the question about electronics, audio, a personal ECG reading that needs a clinician, or physics? boundary
Named
Named waveforms.
Named
Named.
- What are ECG waveforms, square waves, periodic and non-sinusoidal waveforms and the supersaw? definition
- Which entry fits the specific waveform? action
Signals Signal analysis.
Science.
Fourier
Fourier analysis.
Fourier
Fourier.
- How can any periodic waveform be expressed as harmonics? provenance
- Which references are standard? provenance
Sampling
Sampling.
Sampling
Sampling.
- How do sampling rate and the Nyquist theorem affect digitised waveforms? provenance
- Which sources are cited? provenance
Applications Applications.
Application.
Audio
Sound synthesis.
Audio
Audio.
- How do synthesisers use basic waveforms, and how does the supersaw work? provenance
- Which entry fits subtractive synthesis? action
Medical
ECG waveforms.
Medical
Medical.
- What do P waves, QRS complexes and T waves represent, in general terms? provenance
- Which entry fits electrocardiography? action
Context Instruments.
Context.
Oscilloscope
Oscilloscopes.
Oscilloscope
Oscilloscope.
- How do oscilloscopes display waveforms? provenance
- Which entry fits oscilloscope? action
Power
Power quality.
Power
Power.
- Why do distorted mains waveforms matter for power quality? provenance
- Which entry fits harmonics (electrical power)? action
What the second pass must settle
- Should supersaw be a separate entry?
- How should signal processing sources be linked?
- Should ECG waveform be moved to cardiology?