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sound intensity

instantaneous product of sound pressure and particle velocity
Class type of: physical quantity, intensity, vector quantity Q1140289

Facts

9 properties
Subclass of
physical quantity, intensity, vector quantity[1][2][3]
Defining formula
\boldsymbol{I} = p \, \boldsymbol{u}
Described by source
ISO 80000-8:2007 Quantities and units—Part 8: Acoustics, ISO 80000-8:2020 Quantities and units — Part 8: Acoustics, Armenian Soviet Encyclopedia, vol. 6[4][5][6]
Different from
time-averaged sound intensity[7]
ISQ dimension
\mathsf{M} \mathsf{T}^{-3}
In defining formula
\boldsymbol{I}, p, \boldsymbol{u}
Maintained by WikiProject
WikiProject Mathematics[8]
Quantity symbol (LaTeX)
\boldsymbol{I}
Recommended unit of measurement
watt per square metre, kilogram per cubic second[9][10]
🏷️ Also known as
en sound energy flux density en sound power density en sound intensity ar شدة الصوت da Lydintensitet de Schallintensität de Schallintensitätspegel de Schallstärke de Schallenergieflussdichte el Ένταση ήχου es potencia acústica media superficial es intensidad de sonido fa شدت صدا fi äänenvoimakkuus fr intensité acoustique fr puissance surfacique acoustique moyenne hu hangintenzitás it Intensità it Intensità acustica ja 音響エネルギー束密度
🔖 Identifiers · 18
GND ID
4179372-9
OpenAlex ID
C63981117
CSO topic ID
acoustic_intensity
Elhuyar ZTH ID
136849
Encyclopædia Britannica Online ID
science/sound-intensity
Freebase ID
/m/02hfqg
Gran Enciclopèdia Catalana ID
intensitat-sonora
Gran Enciclopèdia Catalana ID (former scheme)
0189213
Great Norwegian Encyclopedia ID
lydintensitet
Great Russian Encyclopedia Online ID (2017)
2014035
IEV number
801-21-38
JSTOR topic ID (archived)
sound-intensity
Show all 18 identifiers +6
Lex ID
lydintensitet
Microsoft Academic ID (discontinued)
63981117
QUDT dimension ID
A0E0L0I0M1H0T-3D0
QUDT quantity kind ID
SoundIntensity
Wolfram Language quantity ID
SoundIntensity
YSO ID
4627

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
Subclass of 3
physical quantity, intensity, vector quantity
Maintained by WikiProject 1
WikiProject Mathematics
← Facet of 1
noise map
← Has effect 1
fundamental frequency
← Measured physical quantity 1
decibel
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References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [1] ↑ . wikidata.org.
  2. [2] ↑ . wikidata.org.
  3. [3] ↑ . wikidata.org.
  4. [4] ↑ . wikidata.org.
  5. [5] ↑ . wikidata.org.
  6. [6] ↑ . wikidata.org.
  7. [7] ↑ . wikidata.org.
  8. [8] ↑ . wikidata.org.
  9. [9] ↑ . ISO 80000-8:2007 Quantities and units—Part 8: Acoustics. wikidata.org.
  10. [10] ↑ . ISO 80000-8:2020 Quantities and units — Part 8: Acoustics. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). sound intensity. Retrieved November 11, 2026, from https://4ort.xyz/entity/sound-intensity
MLA “sound intensity.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Nov. 2026, https://4ort.xyz/entity/sound-intensity.
BibTeX @misc{4ortxyz_sound-intensity_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{sound intensity}}, year = {2026}, url = {https://4ort.xyz/entity/sound-intensity}, note = {Accessed: 2026-11-11}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): sound intensity — https://4ort.xyz/entity/sound-intensity (retrieved 2026-11-11)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 26w ago · Twofivesixbot bot · 2026-05-17 view diff on Wikidata ↗
    Maintained by WikiProject → WikiProject Mathematics
    Recommended unit of measurement → watt per square metre, kilogram per cubic second
    Different from → time-averaged sound intensity
    Described by source → ISO 80000-8:2007 Quantities and units—Part 8: Acoustics, ISO 80000-8:2020 Quantities and units — Part 8: Acoustics, Armenian Soviet Encyclopedia, vol. 6
    + 1 other property edited (see Wikidata diff for full list)
    "Changed claim qualifiers: YSO ID: 4627, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.