", "

Why do the airbags of an eye massager need slow inflation and slow deflation?

Airbag inflation and deflation speed directly affects the pressure feel.

Inflating too fast creates an impact sensation, and deflating too fast drops the pressure around the eye area abruptly, reducing comfort.

A reasonable rhythm is slow inflation, a short hold, then smooth deflation, giving the eye muscles time to adapt to the pressure change.

This process needs stable pump output and accurate valve switching.

If pump noise is obvious, the slow rhythm actually makes the hum more continuous and easier to notice.

That is why a silent pump and rhythm design should be optimised together.

Learn about eye massager airbag structure →", "

Who is a head-mounted eye massager suitable for?

A head-mounted eye massager suits people who use their eyes for long periods, people who relax before sleep, and people who want a lunch-break refresh.

It creates air pressure massage by wrapping airbags around the eye area without pressing the eyeball directly, and the tightness should be moderate when worn.

For people with sensitive eye areas or contact lenses, it is recommended to remove the lenses and lower the intensity before use.

Those with glaucoma, retinal disease or recent eye surgery should consult a doctor first.

In addition, quietness directly affects usability in sleep-aid scenarios, so look for measured pump noise data and a test report when buying.

View head-mounted eye massagers →" ]; document.getElementById("knowledgeBox").innerHTML = knowledgeList[Math.floor(Math.random() * knowledgeList.length)]; var faqs = [ ["What is the core component of an eye massager?", "The core air-source component is the silent air pump; the model referenced in this article is the PM021D high-frequency air pump."], ["What is the PM021D?", "A high-frequency air pump, rated DC 3.7 V, working band 20–22 kHz, providing an air source for small pneumatic devices such as eye massagers."], ["What is the report number?", "ZCT2502070020101, issued on 13 February 2025."], ["Which laboratory performed the test?", "Dongguan Zhongcheng Testing Technology Service Co., Ltd., Room 206, Building 6, No. 268 Gaoyu North Road, Tangxia Town, Dongguan, Guangdong Province."], ["Who is the applicant and who is the manufacturer?", "Both are Xiamen Weineng Electronics Co., Ltd., No. 881 Tonglong 2nd Road, Torch High-tech Zone (Xiang'an) Industrial Area, Xiamen."], ["What is the rated voltage of the pump?", "DC 3.7 V."], ["What is the power supply nature of the pump?", "DC, direct current supply."], ["What is the working band of the pump?", "20–22 kHz."], ["What is the measured noise at 30 cm?", "Less than 10 dB; measured values in the four directions fall between 9.0 and 9.7 dB."], ["What are the four measured values?", "Front 9.7 dB, back 9.2 dB, top 9.4 dB, bottom 9.0 dB."], ["What is the test conclusion?", "After testing, the results of all tested items are qualified."], ["Why is it called a silent air pump?", "Noise at 30 cm is below 10 dB, close to the threshold of human hearing, so it is almost imperceptible in real use."], ["How loud is 10 dB roughly?", "Roughly the level of very faint breathing in a quiet room; it must be very close to be heard."], ["What does 20–22 kHz mean?", "Human hearing spans about 20 Hz to 20 kHz; above 20 kHz is the ultrasonic band, which most adults cannot hear."], ["Why is it not noisy even when worn on the face?", "The fundamental frequency falls above the upper hearing limit and the overall sound pressure is extremely low; together they make the subjective experience close to silent."], ["How far is the pump from the ear inside the device?", "Inside a head-mounted mask the pump is about 10–20 cm from the ear, which is very close and highly sensitive to noise."], ["How loud is an ordinary micro pump?", "Common small pumps are around 40–55 dB at close range, with a clearly audible hum at the ear; actual products may differ."], ["Why does low noise matter before sleep?", "Ambient noise is low at bedtime, and noise below 10 dB basically will not interrupt falling asleep."], ["Does quietness help livestreaming and video shooting?", "Yes; no pump hum is picked up by the microphone, so the final recording is cleaner."], ["What is the noise test based on?", "The customer commissioned technical specification, with reference to GB/T 4963-2007 Acoustics — Standard equal-loudness-level contours."], ["What were the test environment conditions?", "Temperature 23.5 °C, humidity 53 %RH."], ["What was the test distance?", "30 cm."], ["What instrument was used?", "A digital sound level meter."], ["What was the condition of the samples?", "Intact appearance and normal function, confirmed before testing."], ["How many samples were submitted?", "4 pieces."], ["When were the samples received and tested?", "Received on 07 February 2025; tested from 07 February to 12 February 2025."], ["What standard covers safety?", "GB 4706.1-2005 Household and similar electrical appliances — Safety — Part 1: General requirements."], ["Which appliance class does the pump belong to?", "Class III appliance, supplied by safety extra-low voltage."], ["Why is it judged a Class III appliance?", "It is supplied by 3.7 V DC extra-low voltage, which matches the definition of a Class III appliance."], ["What was the result of the marking and instructions clause?", "Clause 7.1 was judged P, that is, pass."], ["What was the result of the user manual clause?", "Clause 7.12 was judged P; the product is supplied with a user manual."], ["What language is required for the manual?", "Clause 7.13 requires simplified Chinese; judged P."], ["What was the result of the label durability test?", "Clause 7.14: after the rubbing test the marking remained legible, with no curling and not easily removed; judged P."], ["What is required for the marking position?", "Clause 7.15: the marking shall be on the main body of the appliance; judged P."], ["What does P mean in the report?", "It means the test conclusion for that clause is pass."], ["What does N/A mean in the report?", "It means the clause is not applicable or not performed."], ["What do clauses not appearing in the report mean?", "It means those clauses are not related to the structure or purpose of the submitted sample."], ["What does responsible only for the submitted samples mean?", "Commissioned testing is responsible only for the samples sent by the customer and does not represent the quality of the whole batch."], ["Can the report be used for legal disputes?", "No; the report states that it does not serve as a basis for any legal dispute judgement."], ["What can the report data be used for?", "Scientific research, teaching, internal quality control and product development."], ["Who was the main tester?", "Wang Song."], ["Who reviewed the report?", "Fan Qiubing."], ["Who approved the report?", "Yang Fan."], ["How many pages does the report have?", "9 pages in total."], ["What are the laboratory contact details?", "Telephone and fax (0769)81283616; email zc@dgzctest.com."], ["What does the pump do inside the eye massager?", "It drives the airbags to inflate and deflate periodically, creating air pressure massage and a pressing rhythm."], ["What is the typical air path structure?", "A combination of pump, solenoid valves, airbags and air distributor; the main board controls the timing."], ["Does silent design reduce massage strength?", "No; noise and air pressure output are two independent metrics, and strength is mainly determined by pressure and air volume."], ["How can noise be further reduced during installation?", "Add silicone damping pads between the pump body and housing, connect the air path with hoses and avoid rigid direct contact."], ["What happens if the air path is blocked?", "Load rises, temperature and noise both increase, and service life may be shortened."], ["What does the 20–22 kHz working band mean?", "It is the frequency range of the drive signal during operation, and also the band where noise energy is concentrated."], ["How long can the pump run continuously?", "The report does not specify continuous run time; follow the device thermal design and the manufacturer specification sheet."], ["Can the pump be washed with water?", "No; it is an electrical part and must not be immersed or rinsed."], ["Can the inlet be placed against the housing?", "No; air intake space must be left, otherwise load and noise both rise."], ["Where should the pump be installed in the eye massager?", "As far as possible from the ear and face contact area, and away from thin-wall cavities that easily resonate."], ["How can I tell whether the pump is installed correctly?", "After power-on, the air path is clear, there is no abnormal vibration, and no obvious hum is heard subjectively."], ["Will noise increase with long-term use?", "If the air path collects dust, damping pads age or fasteners loosen, noise may rise; periodic inspection is needed."], ["Why is a hose recommended for connecting the airbags?", "A hose blocks vibration from travelling along rigid structures and is an effective way to reduce structural noise."], ["Can I disassemble the pump myself?", "Not recommended; disassembly destroys dynamic balance and sealing, and is outside the scope of the report."], ["What should I watch when replacing the pump?", "Keep model, voltage and frequency band consistent, and re-verify whole-device noise and air pressure."], ["Which beauty devices is a silent air pump suitable for?", "Face and neck beauty devices that need airbag compression, vacuum suction or massage head vibration."], ["Why does a collagen beauty device need a pump?", "It drives the vacuum suction head or airbag massage structure and works together with light therapy or radio frequency functions."], ["What is the selling point of quietness for eye massagers?", "Users can use the device while relaxing or half asleep without being interrupted by mechanical noise."], ["What are the noise requirements in a beauty salon?", "The environment is relatively quiet, and device noise directly affects customer experience and communication with the technician."], ["Where is the noise pain point of an eye massager?", "The device sits against the head and the noise source is very close to the ear, so even 30 dB sounds loud."], ["Does low noise improve repurchase for eye massagers?", "Yes; quietness is one of the experience metrics users notice most easily and mention most often in reviews."], ["Is the eye massager suitable for mother-and-baby scenarios?", "Noise is extremely low so it is theoretically suitable, but whole-device safety standards should still be evaluated separately."], ["Is the eye massager suitable for the office?", "Yes; noise below 10 dB will not disturb colleagues."], ["Is the eye massager suitable for travel?", "Yes; using it on a plane or train will not disturb the passenger next to you."], ["Will 20–22 kHz interfere with other equipment?", "This is an ultrasonic band and generally does not affect audio equipment, but compatibility with other ultrasonic devices should be checked."], ["Can pets hear the pump?", "Cats and dogs have a higher hearing limit than humans and may still perceive above 20 kHz; actual testing is recommended."], ["Does the report cover the whole eye massager?", "No; the report covers only the submitted high-frequency air pump sample."], ["How should whole-device noise be accepted?", "Use whole-device noise not higher than 15 dB at 30 cm as an internal control target, with batch sampling."], ["Which metrics should incoming inspection check?", "Model, voltage, frequency band, noise at 30 cm, appearance, function and air tightness."], ["How should the sampling ratio be set?", "Follow the AQL sampling standard; key batches may be screened 100% by powered listening."], ["How do I troubleshoot excessive whole-device noise?", "First check air path blockage and assembly stress, then damping pads and fasteners, and finally re-measure the pump alone."], ["How is a whole-device noise comparison test done?", "Fix the 30 cm distance, fix the ambient background, use the same instrument and the same working mode, and average several measurements."], ["What are the requirements for background noise during testing?", "The background should be at least 10 dB lower than the measured noise, otherwise the result is unreliable."], ["Can the report be used as marketing material?", "Measured data may be cited within a compliant scope, but sample information and test conditions must be stated."], ["What should I watch when citing report data?", "State the report number, the laboratory and the test conditions, and avoid quoting out of context."], ["Does the report have a validity period?", "The report has no fixed validity period; re-testing is required after changes in product structure or process."], ["Does exporting an eye massager require new testing?", "Yes; exports must be certified separately according to the regulations and standards of the target market."], ["Does the report cover EMC?", "No; this report mainly covers noise testing and general safety clauses of GB 4706.1."], ["What is GB/T 4963-2007?", "A standard in acoustics for equal-loudness-level contours, describing the subjective perception of sounds at different frequencies."], ["Why reference equal-loudness-level contours?", "The ear is more sensitive to high frequencies and less to low ones; equal-loudness contours evaluate noise closer to real hearing."], ["What is the scope of GB 4706.1-2005?", "General safety requirements for household and similar electrical appliances."], ["Do Class III appliances need earthing?", "No; Class III appliances rely on safety extra-low voltage supply for safety."], ["What should be noted about 3.7 V supply?", "Do not exceed the rated voltage, and the power supply must match the pump rating."], ["How is pump life evaluated?", "Run continuous operation and start-stop cycle tests per the manufacturer specification, observing noise and pressure decay."], ["Does the report include life testing?", "No; the test items are noise testing and general clauses of GB 4706.1."], ["How can the quietness advantage be made perceivable to users?", "State the measured below 10 dB at 30 cm clearly on the product page and demonstrate a comparison with an ordinary pump."], ["Does quietness equal no vibration?", "No; quietness refers to airborne noise, while vibration still needs to be handled by damping structures."], ["What material should damping pads use?", "Silicone or EVA is common; hardness and thickness should match the pump weight and vibration frequency."], ["Are there requirements for pump mounting orientation?", "Avoid the direction of greatest vibration and thin housing walls to reduce resonance amplification."], ["Will multiple pumps in parallel be noisier?", "Yes; sound pressure adds up and beat frequencies may occur, so phase and installation optimisation is needed."], ["How should quietness be specified when purchasing pumps?", "State that noise at 30 cm shall not exceed 10 dB and require a third-party test report as evidence."], ["How can a supplier quietness claim be verified?", "Require a third-party report and re-measure under the same conditions yourself for comparison."], ["Is the report data reproducible?", "It is reproducible under the same environment, distance and instrument conditions; environmental changes cause deviations."], ["What are the common failure modes of a silent air pump?", "Air path blockage, diaphragm ageing, damping pad detachment and fastener loosening."], ["What should be done when after-sales feedback reports louder noise?", "Clean the air path and check the damping structure first, and replace the pump if necessary."], ["In one sentence, what is the value of the PM021D in an eye massager?", "With a measured quietness of below 10 dB at 30 cm, it gives the eye massager an air source that cannot be heard."] ]; function buildItem(f, i) { return ''; } var box50 = document.getElementById("faq50"); var boxMore = document.getElementById("faqMore"); var html50 = "", htmlMore = ""; for (var i = 0; i < faqs.length; i++) { if (i < 50) { html50 += buildItem(faqs[i], i); } else { htmlMore += buildItem(faqs[i], i); } } box50.innerHTML = html50; boxMore.innerHTML = htmlMore; var btn = document.getElementById("faqBtn"); var expanded = false; btn.addEventListener("click", function () { expanded = !expanded; 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