[Fashion Headphones] Many young people like to wear headphones. Whether they are riding a bus or walking, they are used to plugging in headphones. If the headphones are used improperly and over-used, it may take a long time to cause sudden deafness.
Sudden deafness symptoms:
Deafness: The disease is fierce, and hearing loss can occur instantaneously, hours, or days, from mild to total deafness. It can be temporary or permanent. Mostly unilateral, occasionally both sides occur simultaneously or sequentially.
Tinnitus: There are many tinnitus before and after deafness, which usually occurs several hours before the deafness and is mostly snoring. It can last for 1 month or longer. Some patients may emphasize tinnitus and ignore hearing loss.
Vertigo: Many patients will be accompanied by varying degrees of dizziness, nausea, vomiting symptoms, remission after a period of time, not repeated attacks.
Ear blockage: Ear blockage usually precedes deafness, which is one of the hallmark signs of sudden deafness. Patients can be noticeably aware.
Nystagmus: If there is vertigo, there may be spontaneous nystagmus. This kind of situation is rare and the patient is not aware of it. Therefore, be more careful.
Wearing headphones correctly is especially important for protecting your ears. Headphones are generally classified into three types: head-mounted, ear-mounted, and in-ear. The ear damage is the earliest. Compared with the in-ear and ear-hook styles, although the headset does not have the advantages of compactness and portability, it does not need to be worn when worn, so the damage to the ear canal and eardrum is minimal.
In order to avoid the harm caused to the human body by the earphone, when you wear it, pay attention to: Do ​​not open the volume too loud. When listening to music with headphones, you should pay attention to control the volume. It is best to keep it at 40-60 dB (ordinary conversation or slightly smaller). Feel comfortable and pleasing to the ear; do not listen continuously for a long time, adults use the headset no more than 3-4 hours a day, and intermittent listening is appropriate, preferably every half an hour, let the ear rest for a while; pay attention to keep the earplugs clean and timely cleaning In a noisy environment such as a bus, a noisy street, it is best not to wear headphones to listen to music or make phone calls.

————For more information, headset business opportunities, headset purchase, please pay attention to China Headphone Network: [/], welcome to use free trial membership, contact information

Gear Reducer Motor

Gear Reducer Motor is a small precision reducer, and the size and specification can be customized below 38mm. Shenzhen shun cheong electrical co., LTD. 15 years engaged in the design, development, manufacture Dc Gear Motor, products applicable to the smart home, widely used in intelligent robot voice interaction, children's education escort robot, intelligent sweeping machine robot, intelligent robot adaptability, independent motor, intelligent medical robot project.

Application field:

Method of use: the best stable in horizontal plane, installed on the gear reducer motor output shaft parts, cannot use a hammer to knock,knock prone to press into the gear reducer motor drive, may cause damage to internal components, and cannot be used in the case of blocked.

Operating temperature range:

Gear reducer motor should be used at a temperature of -10~60℃.

The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.

If a geared motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.

Storage temperature range:

Gear reducer motor should be stored ta a temperature of -15~65℃.

In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.

Service life:

The longevity of gear reducer motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.

●Use with a load that exceeds the rated torque

●Frequent starting

●Momentary reversals of turning direction

●Impact loads

●Long-term continuous operation

●Forced turning using the output shaft

●Use in which the permitted overhang load or the permitted thrust load is exceeded

●A pulse drive ,e.g.,a short break,counter electromotive force,PWM control

●Use of a voltage that is nonstandard as regards the rated voltage

●Use outside the prescribed temperature or relative-humidity range,or in a special environment.

●Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.

when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.

Gear Reducer Motor,Reducer Motor,Gear Reducer Stepper Motor,Dc Reducer Gear Motor

Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com