# Noise (electronics)
<!-- MICROSIMGEN:BEGIN v1.7 — generated by g08_place_microsims.py; three.js first (§15); do not hand-edit inside -->
## Microsims — p5.js
### Noise (electronics) (p5.js) · `thermal/shot`
<div class="microsim-player">
<iframe src="https://editor.p5js.org/sciencenibber/full/q_kzHjs2s" width="100%" height="480" frameborder="0" loading="lazy" sandbox="allow-scripts allow-same-origin" title="Noise (electronics) — p5.js microsim"></iframe>
</div>
*The unavoidable random fluctuations circuits add to a signal, setting the noise floor.*
**Open in the editor:** [▶ fork this sketch](https://editor.p5js.org/sciencenibber/sketches/q_kzHjs2s) · movement *IX · Foundations & the rest of the toolbox* · library `p5js`
### Related microsims
Live sims on neighbouring articles — 5 of them inside this article's own Wikipedia link tree:
- [[Communication_channel]] *(in tree)*
- [[Decibel]] *(in tree)*
- [[Distortion]] *(in tree)*
- [[Error_detection_and_correction]] *(in tree)*
- [[Signal-to-noise_ratio]] *(in tree)*
- [[Analog_signal]]
*Sim hosted off-article; the article owns the reference, not the runtime (WIKI_RULES §10.4). Placed by `g08_place_microsims.py`.*
<!-- MICROSIMGEN:END -->
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Noise_(electronics).json (2026-07-30T02:09:12Z) -->
`180-line_television_system` · `343-line_television_system` · `375-line_television_system` · `405-line_television_system` · `441-line_television_system` · `455-line_television_system` · `819_line` · `Acoustic_quieting` · `Acoustics` · `Active_noise_control` · `Additive_white_Gaussian_noise` · `Amplifier` · `Analog_television` · `Anisotropic_diffusion` · `Antenna_(radio)` · `Architectural_acoustics` · `Atmospheric_noise` · `Autoencoder` · `Background_noise` · `Band-stop_filter` · `Bilateral_filter` · `Bit_error_rate` · `Black_level` · `Blanking_level` · `Block-matching_and_3D_filtering` · `Broadcast_television_systems` · `Broadcast_transmitter` · `Brownian_noise` · `Burst_noise` · `CCIR_System_A` · `CCIR_System_B` · `CCIR_System_C` · `CCIR_System_D` · `CCIR_System_E` · `CCIR_System_F` · `CCIR_System_G` · `CCIR_System_H` · `CCIR_System_I` · `CCIR_System_K` · `CCIR_System_L` · `CCIR_System_M` · `CCIR_System_N` · `Capacitive_coupling` · `Carrier-to-noise_ratio` · `Channel_noise_level` · `Chrominance` · `Circuit_noise_level` · `Clear-Vision` · `Color_burst` · `Color_frame_sequence` · `Color_killer` · `Color_television` · `Colors_of_noise` · [[Communication_channel]] · [[Communications_system]] · `Composite_video` · `Contrast-to-noise_ratio` · `Copyright_status_of_works_by_the_federal_government_of_the_United_States` · `Corona_discharge` · `Cosmic_noise` · `Crosstalk` · `DBm0` · `DBrn` · [[Decibel]] · `Differential_gain` · `Differential_phase` · `Digital_television_transition` · `Diplexer` · `Dipole_antenna` · `Discovery_of_cosmic_microwave_background_radiation` · [[Distortion]] · `Distortionmeter` · `Dither` · `Dot_crawl` · `Dummy_load` · `Eb/N0` · `Effective_input_noise_temperature` · [[Electric_current]] · `Electrical_conductor` · `Electromagnetic_compatibility` · `Electromagnetic_interference` · [[Electron]] · [[Electronics]] · `Equivalent_noise_resistance` · `Equivalent_pulse_code_modulation_noise` · [[Error_detection_and_correction]] · `Faraday_cage` · `Field_strength_meter` · `Flicker_noise` · `Fluorescent_lamp` · `Frequency` · `Frequency_mixer` · `Frequency_modulation` · `Frequency_offset` · `Gaussian_blur` · `Gaussian_noise` · `General_Services_Administration` · `Ghosting_(television)` · `Gradient_noise` · `Grey_noise` · `Hanover_bars` · `Health_effects_from_noise` · `Horizontal_blanking_interval` · `Horizontal_scan_rate` · `Hydrogen_line` · `Image_noise` · `Inductive_coupling` · `Infrasound` · `Integrated_circuit` · `Intercarrier_method` · `Interference_(communication)` · `Intermediate_frequency` · `Intermodulation` · `Jitter` · `Johnson–Nyquist_noise` · `Lightning` · `List_of_noise_topics` · `Low-pass_filter` · `Luma_(video)` · `MIL-STD-188` · `Mean_squared_error` · `Median_filter` · `Microwave_transmission` · `Modulation_error_ratio` · `Multichannel_Television_Sound` · `NICAM` · `NTSC` · `NTSC-J` · `Noise` · `Noise,_vibration,_and_harshness` · `Noise_(disambiguation)` · `Noise_(signal_processing)` · `Noise_(spectral_phenomenon)` · `Noise_(video)` · `Noise_and_vibration_on_maritime_vessels` · `Noise_barrier` · `Noise_control` · `Noise_figure` · `Noise_floor` · `Noise_generator` · `Noise_measurement` · `Noise_pollution` · `Noise_power` · `Noise_reduction` · `Noise_regulation` · `Noise_shaping` · `Noise_spectral_density` · `Noise_temperature` · `Nominal_analogue_blanking` · `Non-local_means` · `Null_fill` · `Outline_of_television_broadcasting` · `Output_power_of_an_analog_TV_transmitter` · `Overscan` · `PAL` · `PAL-M` · `PAL-S` · `PALplus` · `Path_loss` · `Peak_signal-to-noise_ratio` · `Pentode` · `Phase_distortion` · `Phase_noise` · [[Physics]] · `Pink_noise` · `Power_(physics)` · `Probability_distribution` · `Pseudorandom_noise` · `Quadrature_amplitude_modulation` · `Quantum_noise` · `Radiation` · `Radiation_pattern` · `Radio_frequency` · `Radio_jamming` · `Radio_propagation` · `Radio_receiver` · `Random_number_generation` · `Raster_scan` · `Residual_carrier` · `Resistor` · `Resonator` · `Root_mean_square` · `SECAM` · `Safe_area_(television)` · `Semiconductor` · `Shielded_cable` · `Shot_noise` · `Shrinkage_Fields_(image_restoration)` · `Signal-to-interference-plus-noise_ratio` · `Signal-to-interference_ratio` · [[Signal-to-noise_ratio]] · `Signal-to-noise_ratio_(imaging)` · `Signal-to-quantization-noise_ratio` · `Single-sideband_modulation` · `Skew_(antenna)` · `Solar_cycle` · `Sound_masking` · `Soundproofing` · `Space_charge` · `Sparklies` · `Spectral_density` · `Spectrum_analyzer` · `Split_sound_system` · `Standard_deviation` · `Stochastic_process` · `Stochastic_resonance` · [[Sun]] · `Superheterodyne_transmitter` · `Synchronization_of_TV_transmitter_and_receiver` · [[Telecommunications]] · `Teletext` · `Television_channel_frequencies` · `Television_interference` · `Television_lines` · `Television_receive-only` · `Television_transmitter` · `Terrestrial_television` · `Thermal_radiation` · [[Thermodynamics]] · `Total_variation_denoising` · `Transmitter_station` · `Transposer` · `Twisted_pair` · `Ultra_high_frequency` · `VIT_signals` · `Vacuum_tube` · `Value_noise` · `Variance` · `Vectorscope` · `Vertical_blanking_interval` · `Vertical_interval_timecode` · `Very_high_frequency` · [[Voltage]] · `Watt` · `Wavelet` · [[Wayback_Machine]] · `White_clipper` · `White_noise` · `Worley_noise` · `Zero_reference_pulse` · `Zweikanalton`
> Signal Processing concept · part of the Signal Processing Portal · movement IX · !09 解析 kaiseki.svg
## What it is
Noise in electronics is the unwanted random fluctuation of voltage or current that accompanies a desired signal, arising from physical processes within components and circuits.
## How it works / why it matters
Sources include thermal (Johnson–Nyquist) noise from resistive elements, shot noise from discrete charge carriers, and flicker (1/f) noise, and together they set a fundamental floor on the smallest detectable signal. Signal processing addresses electronic noise through the signal-to-noise ratio as a figure of merit and through filtering, averaging, and estimation techniques that recover the signal from the fluctuations.
## Signs & universals
Instantiates:
noise
signal
measurement
probability
## Related
Thermal noise · [[Signal-to-noise_ratio]] · Noise (physics) · [[Probability_density_function]] · [[Analog_signal]] · Signal Processing
---
Back to Signal Processing Portal · the room · Semiotic gateway
<!-- CRAFT-LINK:START g12 -->
*Built to the [[WT!P5_js_Microsim_Master_Class|p5.js Master Class]].*
<!-- CRAFT-LINK:END -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Noise_%28electronics%29) : [Wikitube](https://en.wikitube.io/wiki/Noise_%28electronics%29)
## Previous hub tags
Tree parent: [[Information_theory]].
Legacy hubs: none.
---
*Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*