Document Overview
Key Findings All three S4 SUP pump samples recorded sound pressure levels between 90.3 dB and 90.9 dB at 1 m front-face distance, falling within the evaluable range of the internal standard (Lmax 35–100 dB); results are provided for reference only. Product: S4 SUP Pump…
- Document type
- Certification Report
- Prepared by
- Daniel Wright
- Published
- Last reviewed
- Topics
- Noise Testing
Key Findings
All three S4 SUP pump samples recorded sound pressure levels between 90.3 dB and 90.9 dB at 1 m front-face distance, falling within the evaluable range of the internal standard (Lmax 35–100 dB); results are provided for reference only.
- Product: S4 SUP Pump (浆板泵)
- Report No.: 2025081801
- Test Date: 2025-08-18
- Samples: 3 units
- Measurement distance: 1 m, microphone level with product front face
- Noise range: 90.3 dB – 90.9 dB
- Verdict: For Reference Only
Test Overview
| Field | Details |
|---|---|
| Test Type | Noise Testing (Reliability Test) |
| Test Standard | Internal Standard — Sound Pressure Level Evaluation (Lmax 35–100 dB) |
| Report No. | 2025081801 |
| Test Date | 2025-08-18 |
| Product No./Name | S4 SUP Pump (浆板泵) |
| Model / Specification | S4 |
| Manufacturer | ETENWOLF |
| Sample Quantity / No. | 3 PCS |
| Test Purpose | Evaluate the noise level of the sample under different operating scenarios |
| Test Environment | Room Temperature: 23 °C, Relative Humidity: 60% |
Test Equipment & Setup
| Item | Details |
|---|---|
| Test Equipment | Sound Level Meter (噪音计) |
| Microphone Position | Horizontally level with the front face of the product |
| Measurement Distance | 1 m from product front face |
| Measurement Direction | Front face (正面) |
| Acceptance Criterion | Sound pressure level Lmax: 35–100 dB |
| Ambient Temperature | 23 °C |
| Relative Humidity | 60% |
| Product State During Test | Power-on, operating state |
Test Procedure
- Pre-test: Confirm ambient conditions — temperature 23 °C, relative humidity 60%. Verify the sound level meter is calibrated and functional.
- Sample preparation: Label three S4 SUP pump units as 1#, 2#, and 3#. Place each sample on a stable surface in the test environment.
- Microphone placement: Position the microphone at a horizontal distance of 1 m from the front face of the product, at the same height as the product front face.
- Measurement: Power on the sample. Record the maximum sound pressure level (dB) displayed on the sound level meter while the product is running.
- Repeat: Perform the measurement for each of the three samples (#1, #2, #3) under identical conditions.
- Post-test: Power off each sample. Record all readings and environmental conditions. Compare results against the acceptance criterion (Lmax 35–100 dB).
Acceptance Criterion: Sound pressure level must fall within Lmax 35–100 dB for the result to be evaluable under the internal standard.
Test Data & Results
| Sample No. | Direction | Distance from Microphone | Noise (dB) |
|---|---|---|---|
| 1# | Front (正面) | 1 m | 90.9 |
| 2# | Front (正面) | 1 m | 90.3 |
| 3# | Front (正面) | 1 m | 90.9 |
Observations: All three samples produced consistent readings in the range of 90.3–90.9 dB at 1 m from the front face during normal operation. The spread across samples is 0.6 dB, indicating good unit-to-unit consistency. All values fall within the evaluable window of the internal standard (Lmax 35–100 dB).
Conclusion
| Field | Details |
|---|---|
| Result Range | 90.3 dB – 90.9 dB |
| Standard | Internal Standard — Lmax 35–100 dB |
| Test Conditions | 23 °C, 60% RH, 1 m front-face distance, product powered on |
| Samples Tested | 3 PCS (1#, 2#, 3#) |
| Verdict | For Reference Only (供参考) |
Document Information
| Role | Name (Pinyin) | Date |
|---|---|---|
| Tested By (测试/日期) | Li Guanghua | 2025-08-18 |
| Checked By (审核/日期) | Zhang Ronggui | 2025-08-18 |
| Approved By (核准/日期) | Mai Shaoqiang | 2025-08-18 |
| Report No. | 2025081801 | |
| Source File | S4充浆泵-噪音测试 2025.8.18.xlsx | |
Frequently Asked Questions
How loud is the ETENWOLF S4 SUP pump during operation?
In controlled testing at 1 m from the front face, the S4 SUP pump measured between 90.3 dB and 90.9 dB across three samples. This is comparable to a motorcycle at close range and is expected for a high-pressure electric inflation pump running at full load.
What test standard was used for the S4 noise measurement?
The test used ETENWOLF’s internal standard, which evaluates sound pressure level within an Lmax range of 35–100 dB. The microphone was placed 1 m horizontally from the product front face while the unit was powered on and operating.
What does ‘For Reference Only’ mean in this noise test report?
‘For Reference Only’ (供参考) indicates that the test results are informational data points used for internal evaluation and product development. They are not a pass/fail certification against a published regulatory standard such as IEC or ISO.
How many samples were tested in the S4 noise evaluation?
Three production samples (1#, 2#, 3#) were tested under identical conditions — room temperature 23 °C, 60% relative humidity, and a fixed microphone distance of 1 m from the product front face. All three produced consistent readings within a 0.6 dB range.
Related Products
- ETENWOLF S4 20 PSI Electric SUP Pump — the product covered in this noise test report
- ETENWOLF Inflation Tools Product Range — full lineup of electric pumps and inflation accessories