Sound Pressure Level (SPL) Testing Service
Professional Third-Party Acoustic Lab
Sound Pressure Level (SPL) is one of the most fundamental parameters for evaluating acoustic performance and noise levels of products.
It represents the magnitude of sound pressure variations in the air and is widely used to quantify how loud a sound is at a specific location.
At Omniulabs, we provide professional Sound Pressure Level (SPL) testing services, helping customers accurately measure sound output, evaluate noise performance, and meet international acoustic standards.
What is Sound Pressure Level (SPL) ?
Sound Pressure Level (SPL) is a physical quantity used to describe the intensity of sound, expressed in decibels (dB).
It is defined as the ratio between the measured sound pressure and a reference sound pressure:
Where:
- Lp: Sound Pressure Level
- p: Measured sound pressure
- p₀: Reference sound pressure (20 µPa)
Because human hearing responds logarithmically, SPL is expressed using a logarithmic scale.
Why Sound Pressure Testing is Important？
Sound pressure testing plays a critical role in product development, validation, and quality assurance.
Evaluate Acoustic Performance
- Speaker output level
- Audio device performance
- Voice communication clarity
Measure Noise Emission
- Server noise
- Electronic device operating noise
- Cooling fan noise
Ensure Compliance
- Product noise requirements
- Customer specifications
- Industry standards and certifications
Our SPL Testing Capabilities
We provide comprehensive SPL testing services in controlled acoustic environments.
Professional Equipment
- Measurement microphones
- Sound level meters
- Acoustic analysis systems
Controlled Test Environment
- Semi-anechoic chamber
- Low background noise environment
Test Items
- Maximum Sound Pressure Level (Max SPL)
- Low Noise Device Measurement
- Equipment noise measurement
Common Sound Pressure Test Standards
Sound Pressure Level testing is performed according to internationally recognized acoustic standards:
- ISO 7779 — Noise Measurement for Information Technology and Telecommunications Equipment
- ISO 3744 / ISO 3745 — Determination of Sound Power Levels from Sound Pressure Measurements
- ISO 11201 — Sound Pressure Level at Operator Position (Emission Sound Pressure)
- ISO 9296 — Declared Noise Emission Values for Equipment
- ECMA-74 — Measurement of Airborne Noise Emitted by IT and Telecommunications Equipment
These standards ensure test results are consistent, comparable, and globally recognized.
FAQ
Q: What is SPL？
SPL (Sound Pressure Level) is a measurement of sound intensity expressed in decibels (dB).
Q: Is SPL the same as loudness？
SPL is an objective physical measurement, while loudness is a subjective human perception.
Q: Do SPL tests require an anechoic chamber ?
Most accurate SPL measurements are conducted in anechoic or semi-anechoic chambers to minimize environmental noise.
Q: What products require SPL testing ?
- Speakers
- Laptops
- AI servers
- Communication devices
- Audio equipment
Contact Us
Contact Omniulabs for reliable, fast, and internationally compliant acoustic testing services
-
Email: service@omniulabs.com
- Tel: 886-2-77306037
- Add: 6F, No. 8-8, Lane 169, Kangning St., Xizhi District, New Taipei City, Taiwan