当我们的工程师团队访问波兰的工厂的同时,六月对我们来说也是非常有意义的一个月。特别是,在波兰高质量塑料零件的生产是QuietOn一个重要的里程碑,这使我们能够继续推进生产,并逐步接近大规模生产。 制造塑料零件虽然并不容易,但我们终于克服了这个难关。

虽然我们最终得到了塑料零件,但制成品的数量却低于预期。这是因为我们严格把关的音频测试中找到了一些误差,只能接受最好的耳塞。因此,这个成功的比率相当低。这也是为什么我们决定改用更高质量的麦克风。

噪声消除性能取决于噪声与原始声音的匹配程度有多么地准确。所以现在我们正在制造一系列带有新麦克风的耳塞,它对灵敏度的容差更严格。 我们准备了一组新的调整参数,比如参数组可将信号电平提高两个分贝,以补偿麦克风灵敏度的变化。

我们上周收到了新的组件,进行了测试设置并仔细分析。 测试结果显示有明显的改进,因此我们重新回到轨道。 但是,由于这一变化,我们之前对交货计划的评估不能实现。 新的,改进的音频电子设备需要两周的时间才能用于高速生产。 随后,逐步增加生产速度。 尽管有这样的改变,我们还是在六月生产了少量。 从7月开始,将寻求提升产量。

在随后的内容中,我们将告知您有关我们生产过程的重要细节以及正在进行的活动和展览的新闻和发现。

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June has been an eventful month for us, in which our engineering team visited the factory in Poland again. Especially the establishment of the high-quality plastic part production in Poland has been a positive milestone for QuietOn, which enables the manufacturing to progress and allows us to gradually approach the phase of mass production. This plastic part manufacturing set up has been a struggle but finally we managed to overcome it 😊

In the following update, we will share with you the important details of our production process as well as news and insights from ongoing events and exhibitions.

 Here are some insights from the plastic part manufacturing:

Our mechanical engineer Tero is checking the plastic part manufacturing machine in Poland.

A brief introduction of the machine functionality:

First, the mold parts are pushed together, then the plastic grains feeder pumps into the material, the machine heats it up and pushes it through the cylinder with high pressure. The solid plastic gets in the final shape when it is cooled down, then the molds are opened and the parts get out.

The metallic and very precisely manufactured molds are pushed together.

The plastic parts were carefully analysed and manufacturing parameters were adjusted to get the high quality. Those parts were then sent to product assembly from where we got the final approval that they were working perfectly.

The mechanical assembly is confirmed to be completely doable at a high level of accuracy by the well-trained and experienced operators. They are able to assemble the speaker gasket, and top cover with its gaskets reliably. You can refer back to the manufacturing process in this update.

Status

Even though we finally got the plastic parts we were able to produce only smaller quantities of the products than targeted, due to the identified variations in our tight audio quality gate, as only the very best ones were accepted. Hence, the yield was too low. For this reason, we decided to switch to higher quality microphones.

The noise cancelling performance depends on a how accurately the signal matches the original noise. That’s why we are assembling a test batch of the earplugs with a new microphone that has a tighter tolerance of sensitivity. We have prepared a new set of tuning parameters, i.e. sets of parameters that boost the signal level by 2 dB to compensate the microphone sensitivity change.

We got the new components last week, made the test build and analyzed it carefully. The test results show significant improvements so now we are now back on track. However, due to this change, our previous estimation of delivery could not be reached.

This picture shows a close up of the audio responses in certain frequency space. The colored curves represent different devices measured. The lower colored curves in the picture show a group of devices with the improved audio setup. We can see that the variance is much smaller, which means we have higher quality devices.

It will take two weeks to get the new improved audio electronics for a full-speed manufacturing. Subsequently, the manufacturing speed will increase step-by-step. Despite this change, we can still produce a small batch in June. From July on, the ramp up is then targeted to reach the full speed. We aim to produce 3000+ pieces during that month.

 Recent feedback of the product

We have received again a lot of positive feedback from various people who have been testing the device. Perhaps the most significant feedback was the best Good Sleep Award from Japan Sleep Exhibition.

Jurors of the Good Sleep Award and visitors of the Sleep Expo 2019 in Japan were eager to test the earplugs and were delighted and impressed by their effectiveness.

Even if you turn over during sleeping, the products are completely wireless, it will not get annoying or distracting to wear the earplugs. They specialize in sleep, making them different compared to other noise canceling products and very effective.” – Mr. Shogo Fujii, Director of the Medical Health Lab/ Deputy director of Nikkei BP Intelligence Group

People who are troubled with sleep first search for new pillows and other bedding, but QuietOn Sleep functions as a sleep supporter.” – Mr. Norihito Yasuda, Chief editor of Dime from Shogakukan

Apart from that, we got great feedback from Simon Hill, reporter of Digital Trends, specialized on new technology:

QuietOn Sleep did a remarkable job of blocking out noise. It’s most effective against low frequency noises, like snoring, traffic, or airplane engines.”

 We are particularly delighted about the positive comment concerning the audio performance in both hearing and silent mode:

The QuietOn earbuds were very effective at blocking certain noises, so I could be in the room with a robot vacuum and hardly hear it, but when my wife spoke to me, the sound was crystal clear.

For people who crave absolute silence, QuietOn will work best.“ – Digital Trends

Last week, QuietOn exhibited at FTE’s Ancillary Revenue Show in Istanbul. We have welcomed a good stream of visitors from airlines and industry players who have been impressed by QuietOn Sleep’s ability to create silence.

Since we want to ensure the best possible quality, we keep our quality control gate high. Thus, the audio test round has to be done at a maximum accuracy. We have sent our engineers to work onsite with the operators in the factory. So overall, there are some delays, but the project has been progressing in manufacturing and we’re still very confident that you’ll get your investment back at its best returns!

We have been sending out the first dozens of devices to backers and our distribution partners and QuietOn Sleep is getting great reviews, which motivates us strongly in this challenging journey. We continue working hard to get it to you as soon as possible.

We cannot thank you often enough for your support. The uplifting words we keep reading from you help and motivate us on this long road to the completion of QuietOn Sleep. We are endlessly looking forward to finally providing all our supporters with their key to a restful and relaxing sleep. Please stay tuned with us!

Lots of love,

QuietOn team

 

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