Answer first
This page answers the question behind What should users know about ETENWOLF S4 SUP Pump Noise Test Report (90 dB, Front-Face, 1 m)? using the exported M2 source record. The short answer is: 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 . The statement applies to the model, document scope, sample, and conditions described in the source; it is not a blanket claim about every ETENWOLF product or every later production revision.
Scope and document identity
The source record is titled ETENWOLF S4 SUP Pump Noise Test Report (90 dB, Front-Face, 1 m). It is treated here as technical evidence, not as a replacement for the original report, manual, certificate, safety data sheet, or declaration required by a destination market. Start any support or compliance answer by matching the exact model, document number, revision, and date.
What a reader should verify
- Confirm the product model and hardware or material configuration.
- Locate the original source document and check its issue date and laboratory or author.
- Read the stated method, threshold, operating condition, or warning before interpreting a result.
- Separate evidence about EMC, chemicals, battery safety, transport, operation, and measurement accuracy.
Detailed evidence from the source record
The cleaned evidence below preserves the source document’s useful headings, paragraphs, lists, and tables so a human BasePress editor can publish searchable HTML while retaining traceability.
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
How to interpret the answer
A technical document answers a bounded question. A positive test result means the submitted sample met the named requirement under the recorded method; it does not automatically establish legal market access, lifetime reliability, safe use in every environment, or equivalence to an untested revision. When a question goes beyond the source scope, say that the detail is not documented here and request the applicable companion evidence.
What this document does not prove
This rewrite does not create a new certification, warranty, regulatory filing, or product specification. It does not prove that a different model, supplier, battery cell, firmware build, or bill of materials has the same result. It also does not replace the model-specific user manual or advice from a qualified compliance, transport, or safety professional.
Practical review checklist
| Review item | Question to answer before relying on the page |
|---|---|
| Identity | Does the label and shipped configuration match the source sample? |
| Evidence | Can the report, workbook, manual, or MSDS be retrieved from the source notes? |
| Scope | Is the claim limited to the named method, threshold, date, and sample? |
| Change control | Have materials, suppliers, firmware, battery cells, or construction changed? |
| Human action | Has an editor checked the original document before publishing? |
Frequently Asked Questions
Does this page apply to every version of the product?
No. Use it for the exact model and configuration documented in ETENWOLF S4 SUP Pump Noise Test Report (90 dB, Front-Face, 1 m); later revisions require a documented equivalence review.
Can this result be used as a general safety or legal guarantee?
No. The result is evidence for a bounded technical scope. Other requirements may need separate EMC, chemical, battery, transport, or operating documents.
What if the question asks for a value that is not shown?
Do not infer it. State that the value is not documented in this source record and request the original evidence or a qualified review.
Why keep the original document after publishing?
Because the published rewrite is an explanation. The original report or manual remains the authoritative record for traceability, audits, customer support, and change control.