sound pressure: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “sound pressure” mean?
The local deviation from the ambient atmospheric pressure caused by a sound wave, measured in pascals (Pa).
Audio
Pronunciation
Definition
Meaning and Definition
The local deviation from the ambient atmospheric pressure caused by a sound wave, measured in pascals (Pa).
In physics and acoustics, the instantaneous pressure at a point in a medium minus the static pressure, which is the force exerted by a sound wave per unit area; the quantity that determines the perceived loudness of a sound.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Usage is identical in technical contexts.
Connotations
Purely denotative, with no cultural or evaluative connotations.
Frequency
Virtually identical frequency within acoustics, engineering, and occupational safety discourse.
Grammar
How to Use “sound pressure” in a Sentence
The [adjective] sound pressure [verb]...Sound pressure [verb] [adverb]...A sound pressure of [number] [unit]Vocabulary
Collocations
Examples
Examples of “sound pressure” in a Sentence
verb
British English
- The microphone transduces, or converts, the sound pressure into an electrical signal.
- The wave sound pressures the membrane.
American English
- The sensor converts sound pressure into a digital reading.
- The explosion sound pressured the structure.
adjective
British English
- The sound-pressure measurement was crucial.
- We analysed the sound-pressure data.
American English
- The sound-pressure reading exceeded the limit.
- We need a sound-pressure calibrator.
Usage
Meaning in Context
Business
Used in contexts of noise regulation compliance, hearing protection equipment specifications, and acoustic product marketing (e.g., 'The device reduces harmful sound pressure by 30 decibels.').
Academic
Central term in physics, acoustics, audiology, and environmental science papers; used in formulas and experimental descriptions.
Everyday
Rarely used in everyday conversation unless discussing technical aspects of audio equipment or noise pollution in a semi-technical way.
Technical
The primary domain; used with precision in engineering, occupational health, audio engineering, and acoustic research.
Vocabulary
Synonyms of “sound pressure”
Neutral
Weak
Vocabulary
Antonyms of “sound pressure”
Watch out
Common Mistakes When Using “sound pressure”
- Using 'sound pressure' interchangeably with 'volume' in non-technical contexts.
- Incorrectly pluralising as 'sound pressures' when referring to the general phenomenon (acceptable only when referring to multiple distinct measurements).
- Omitting 'level' when referring to 'sound pressure level (SPL)' in decibels.
FAQ
Frequently Asked Questions
No. Sound pressure is an objective, measurable physical quantity (in pascals). Loudness is the subjective, perceptual interpretation of that pressure by the human auditory system, influenced by frequency and duration.
Sound pressure is the instantaneous pressure variation (in pascals). Sound Pressure Level (SPL) is a logarithmic measure (in decibels, dB) that compares a given sound pressure to a reference pressure, making it more practical for representing the vast range of human hearing.
Yes, at very high levels (e.g., from explosions, loud bass), sound pressure waves can be felt as vibrations on the skin and can cause physical discomfort or pain, not just be heard.
It is the fundamental physical cause of the sensation of hearing. Quantifying it is essential for acoustic design, noise control, hearing conservation, audio equipment calibration, and environmental noise regulation.
The local deviation from the ambient atmospheric pressure caused by a sound wave, measured in pascals (Pa).
Sound pressure is usually technical/scientific in register.
Sound pressure: in British English it is pronounced /ˈsaʊnd ˌpreʃ.ər/, and in American English it is pronounced /ˈsaʊnd ˌpreʃ.ɚ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a SPEAKER PUSHING air – the PRESSURE of the SOUND wave it creates is SOUND PRESSURE.
Conceptual Metaphor
SOUND IS A FORCE (exerting pressure).
Practice
Quiz
What is the standard unit of measurement for sound pressure?