Acoustic Calibration Lab: From Specialised To Remarkably Affordable

Did you know that all the equipment needed to build up your Calibration Laboratory is available to streamline the process?

As a matter of fact, we have already arrived at the age of digitalisation. IoT (Internet of Things) and data collection, analysis, reporting and visualisation power up the operation procedure, allowing data-driven decision-making. Acoustic calibration should not be left out.

Precise calibration result is paramount, especially for law enforcement, professional setting and environment. The Environmental Protection Department of HKSARG has issued Technical Memorandum On Noise that contractors are required to follow mandatorily. Otherwise, it is illegal, and the contractors would get sued if they do not comply with the regulations.

An acoustic calibration lab in Hong Kong has marked a new chapter of acoustic calibration. The state-of-art calibration system – Norsonic NOR1504A – has been hired to automate the calibration process. The standard calibration time has effectively reduced from at least two days to less than a half day.

For more, please visit https://esgmatters.asia/hong-kong-acoustic-calibration-centre-hoklas/

We look to raise the acoustic industry standard by providing accurate, affordable, cost-effective acoustic calibration services. In light of that, acoustic calibration lab should not only conduct IEC 61672-3 Ed 2.0 (2013) (the sound level meter standard concerning the loudness – dB) but also IEC 61260:1995 standard about the sound frequency combination to cope with the demand. About 50% of customers’ sound level meter calibration service requests will conduct IEC 61260:1995 alongside IEC 61672-3 Ed 2.0 (2013), as remarked by Mr James Choi, one of the HOKLAS (Hong Kong Laboratory Accreditation Scheme) Approved Signatory.

Acoustic calibration is a professional, cost-effective calibration service. Why do we not practice automated calibration operations to minimise downtime while maximising customer accuracy and performance?

Photo above: The calibration system Nor1504A. For more, please visit https://anewr.com/calibration/

The calibration system Nor1504A can calibrate virtually any sound measuring instruments, sound calibrators and microphones commercially available, provided they have been designed according to applicable international standards. Hence, the system is by no means limited to Norsonic products alone. The verification and calibration of sound level meters in accordance with international standards is generally divided into an electrical and an acoustic part (IEC60651, IEC 60804 and IEC61672). Particular national standards have been designed to cover special needs. A typical example could be the BS7580 or the German DIN45657, which describes the testing of time constant F down to 0.25ms, statistical calculations and the Taktmaximal 3 and 5. The international standards describe tests that have been designed for type approval of an instrument design (e.g. IEC61672 part 2). Still, they do also include tests meant to be performed for verification purposes regularly (e.g. IEC61672 part 3).

Contact us for more for how to set up the automated calibration lab at info@anewr.com.

By: ANEWR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008. Our expertise has grown into the context of air and water qualities, noise, green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policy review, ecological design, monitoring, and audit (EM&A), ANEWR has matured to be a leading management consultancy. Standing in the digital transformation reign, ANEWR has participated in various environmental digital projects – interactive 3D visualisation, immersive automation virtual environment, Virtual reality, automation system, and monitoring platforms.
(Website: https://anewr.com, LinkedIn: ANEWR Consulting Group, Twitter: ANEWR – Everyday Newer,YouTube: https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

Pros And Cons Of The Metaverse’s Environmental Issues

Every little makes a mickle. When we enjoy the convenience digitalisation brings daily, how much impact have we created by utilising this amenity? The metaverse age has arrived. In what ways will metaverse magnify the effect?

We, the frequent email users, can save little by little. Mike Berners-Lee, a carbon footprint research fellow at Lancaster University, estimates that a spam email will induce 0.3g of CO2e. A regular email causes 4g CO2e, and an email with a photo produces 50g CO2e. After sending emails for a year, the CO2e that a typical business user created is comparable to driving 200 miles in a family car. You may think the CO2 emitted by sending emails is the tip of the iceberg. The virtual way of connection in the metaverse age indeed saves us a lot of travel. Remember, carbon emission contributes 27% of the greenhouse gas emissions.

Another leverage of metaverse technology is the look-so-real environment. The close-to-reality scenarios with sense and smell enable training and education that requires the learners to be there to be trained. It is somehow like a simulation, with an immersive view and sense. Impressively, a project helping acousticians realise the result of acoustic products by utilising 4D virtual reality to visualise and illustrate the product’s effectiveness has launched in Hong Kong. The metaverse allows the learners to change scenes, indicating the direction of the specific zone/source and bringing the effect to the audience with sensation. By empowering the learners to instruct and control the stage to approach, the learners experience practical training in authentic training circumstances. If it happens to be the massive training cases, such as military training involving aviation, the impact of metaverse will become more profound.

For every plus, there is a minus—the global metaverse movement streaming greenhouse gases into our planet. Let’s not forget the carbon emissions generated from the AI development life cycle. University of Massachusetts researchers uncovered that nearly 626,000 pounds of CO2 equivalent are produced to train several typical big AI models. That is over five times the quantity of greenhouse gases a car emits during its lifetime. Beyond question, the universal metaverse outlook sets the alarm for other environmental issues—e-waste.

For that reason, corporates, no matter if it’s metaverse service and equipment providers or service consumers, hold accountability for the environmental issues caused by applying metaverse as their business solutions. Even though the company only takes metaverse as one of their, e.g. marketing or engagement campaign solutions, the environmental impact of the solutions should also be taken into account in the company’s overall environmental performance.

“Look before you leap”. Greenwashing harms your company’s reputation; negligence of some critical information revelation costs as much as the same damage.

By: ANewR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008. Our expertise has grown into the context of air and water qualities, noise, green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policy review, ecological design, monitoring, and audit (EM&A), ANewR has matured to be a leading management consultancy. Standing in the digital transformation reign, ANewR has participated in various environmental digital projects – interactive 3D visualisation, immersive automation virtual environment, Virtual reality, automation system, and monitoring platforms.
(Website: https://anewr.com, LinkedIn: ANewR Consulting Group, Twitter: ANewR – Everyday Newer,YouTube: https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

What will a poorly-maintained valve cost you?

In 2010, BP’s shareholder value dropped 50 per cent within three months as a consequence of one environmental disaster that happened at BP, the oil and gas company. A failing safety valve cost BP 6.1 billion US dollars to repair the oil spill. As you would expect, BP risked the license to operate because of the SHE (safety, health and environment) matter. The authority questioned BP’s overall safety procedure at the problem site and all of the BP operating platforms. Twelve years have gone by. BP has spent on cleanup efforts to compensate victims, civil and criminal penalties, payments to state and local governments, and other expenses, paid out more than $70 billion since 2010.

Source: https://www.fox10tv.com/2022/07/08/12-years-later-bp-still-fighting-hundreds-lawsuits-over-deepwater-horizon-spill/

The disastrous oil spilling case mirrored the reactive maintenance approach of the company. Would a proactive maintenance approach mark the distinction?

Emergency and contingency plans are critical for acting quickly to the incident. But this is only one part of the story of crisis management. Under the valued-driven maintenance concept and practice, the business owner would wish to maximise asset utilisation for productivity with the lowest possible maintenance cost. The maintenance period is also part of the consideration. Once the asset is under maintenance, it will stop operation. The pause in production is equivalent to a loss of value generation. The laws and regulations covering safety, health, and the environment are inherent in the maintenance management plan, though it sounds like the SHE department’s job.

Therefore, it is significant to solve the manual scheduled inspection and maintenance problems by identifying potential flaws without interrupting regular operations. If maintenance happens in the industrial area, a common challenge is to identify the defect. And in some cases, the assets deteriorate little by little until breaking down one day. A proactive, well-scheduled, even value-added maintenance management plan and practice are encouraged to preserve the SHE culture.

How can we pick out the faulty point without manual inspection, without disrupting the operation? It will be as tricky as accomplishing a picture-hunting. The noise emitting from the assets may give the maintenance manager a hint.

An acoustic camera is an imaging device to locate and characterise sound sources. It consists of a group of microphones – called a microphone array. They are simultaneously acquired acoustic and video signals to form a representation of the location of the sound sources when coupled with a high-performance optical video camera. An acoustic camera provides clear evidence and instant documentation of noise reduction by letting you listen with your eyes. The acoustic camera’s sound analysis localises and identifies the sound emission, empowering the quality control with finding faults resulting in variations in the soundscape.

The acoustic camera has successfully achieved the following. Find out more with us about what is for your project.

  • Filming sound leakages in a highly reflective office environment, 
  • Filming breakout noise from cafes and concert venues, 
  • Measuring the impact of traffic noise in apartment living room, 
  • using the acoustic camera inside a caravan car to find squeak and rattle noise, 
  • Filming low-frequency structure-borne noise with an acoustic camera, pinpointing low-level sanitary noise in an apartment building, 
  • Identifying short time high, pitched squeak noise from an electric window in the car door, 
  • Finding a weak acoustical point in room diving modular walls,
  • Identifying low-frequency tonal noise in windy and noisy conditions.

By: ANewR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008. Our expertise has grown into the context of air and water qualities, noise, green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policy review, ecological design, monitoring, and audit (EM&A), ANewR has matured to be a leading management consultancy. Standing in the digital transformation reign, ANewR has participated in various environmental digital projects – interactive 3D visualisation, immersive automation virtual environment, Virtual reality, automation system, and monitoring platforms.
(Website: https://anewr.com, LinkedIn: ANewR Consulting Group, Twitter: ANewR – Everyday Newer,YouTube: https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

What are the necessities of the business today?

Business continuity is particularly critical during the Covid-19 pandemic. Developing an organisation’s workforce, taking advantage of remote working, and informing leadership mentorship have become the core of sustaining the business. ESG acquaintance is essential to companies in the climate change years.

In addition, Big Data and Information and Communications Technology (ICT) have recently been controversial subjects.

Whether listed companies, small and medium-sized companies or non-profit-making organisations, they are all moving towards digitalisation. For the future, we must adopt a sustainable attitude, recognise the importance of sustainable development, and pay attention to our daily actions. The first is to understand the trend and then practice.

Data is imperative to understanding where you are, where your peers are, and how you can better position yourself in the market and stay appealing to your customers. Quality and accuracy in collecting, analysing, and disseminating data are essential but can be labour-intensive and time-consuming. Those that can better utilise digital tools can get the job done more quickly and cost-effectively in the long run.

Photo above: Businesses that can better utilise digital tools can get the job done more quickly and cost-effectively in the long run

The world is shifting to digitalisation solutions to reach widespread communication. Digitalisation transforms the experience into a digital presence, contributing to a digestible expression of the technical proposal. The prevalence of digitalisation changes the perception of people.

It is still the learning age for everyone to comprehend the ESG prospect. Flexibility in facing the dynamic demand shift is the competency to sustain businesses in the long run.

By: ANewR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008. Our expertise has grown into the context of air and water qualities, noise, green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policy review, ecological design, monitoring, and audit (EM&A), ANewR has matured to be a leading management consultancy. Standing in the digital transformation reign, ANewR has participated in various environmental digital projects – interactive 3D visualisation, immersive automation virtual environment, Virtual reality, automation system, and monitoring platforms.
(Website: https://anewr.com, LinkedIn: ANewR Consulting Group, Twitter: ANewR – Everyday Newer,YouTube: https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

How do SMEs fit into the ESG world?

In this era, climate change is the burning topic for sustainability. Temperature increases, Sea Level rises, and GHG emissions increase constitute global efforts to address climate change’s impact, e.g. 2015 Paris Agreement and 2021 UN Climate Change Conference COP26. While in Hong Kong, The 2020 Policy Address proclaimed that Hong Kong would aspire to commit to carbon neutrality before 2050. This lies down the real market opportunity for businesses.

ESG (Environmental, Social, and Governance) is a broad topic applying to different industries. Each industry has its ESG issues, regardless of listed companies or small-to-medium enterprises. Companies’ ESG practices reflect the high level of the company values. Therefore, each company in Hong Kong is expected to have at least an understanding of ESG when running the business. People would say, presently, it is more of the listed companies’ responsibility as it is required to be reported by HKEX. But when you learn more, the supply chain is one of the ESG elements needed for reporting. Small and medium-sized enterprises (SMEs) should be aware of it as SMEs could be part of the supply chain of the listed companies.

As a matter of fact, SMEs contribute significantly to the world’s economies. They account for about 99 per cent of firms and 70 per cent of all jobs in OECD countries. Over 50 per cent of GDP is contributed by SMEs in high-income countries worldwide.

Where should SMEs start to incorporate ESG into their business operations?

  • Understand the needs of your customers on ESG disclosure, including for the sake of improving SMEs supply chain visibility;
  • Take stock of what data SMEs have in hand, and carry out a gap analysis on the information SMEs have with that as required by SMEs’ customers;
  • Set up a mechanism or adopt a digital platform to collect the customer’s required data. A digital data platform, such as ESG Dashboard, can be used with IoT sensors. For example, it can connect with air quality sensors to ensure workspace with clean air and staff’s well-being;
  • Know your competitors! To stay competitive, SMEs need better ESG performance than their competitors. Try to research your competitors’ performance and see how to improve. There are platforms out there in the market that can do benchmarking;
  • Dedicated to a cross-functional team. Provide the staff with a training. There are many courses out there. Introductory course is good for a start. There are also technical lectures on the online academy platform (www.matters.academy).
Photo above: A digital data platform, such as ESG Dashboard, can be used with IoT sensors.
Photo above: Introductory course is good for a start. There are also technical lectures on the online academy platform.

Integrating ESG factors in the business flows give the owners and management an excellent framework to rethink where the markets are heading and how their product and services can be changed to meet the needs. ESG segment is extensive, from the education, technical skills, analytical capability, materiality mapping and execution. In these inflation and unstable times, it is advantageous to use an ESG lens to improve operational efficiency, provide clear resolution to ESG risks and use that perspective to develop environmental and social initiatives to fulfil future scenarios successfully.

By: ANewR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008. Our expertise has grown into the context of air and water qualities, noise, green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policy review, ecological design, monitoring, and audit (EM&A), ANewR has matured to be a leading management consultancy. Standing in the digital transformation reign, ANewR has participated in various environmental digital projects – interactive 3D visualisation, immersive automation virtual environment, Virtual reality, automation system, and monitoring platforms.
(Website: https://anewr.com, LinkedIn: ANewR Consulting Group, Twitter: ANewR – Everyday Newer,YouTube: https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

聲學小知識—道路噪聲主動噪聲控制系統是什麼

道路噪聲主動噪聲控制,這是通過抵消汽車行駛中的胎噪和路噪從而降低車內噪聲的系統,就是常聽說的主動降噪。汽車主動降噪系統已經聽說了不少,近日,搭載這種系統的汽車已經進入量產的階段,相信這是未來人們的主要選擇。

與常規的被動式降噪方式相比,可以減少被動降噪帶來的汽車重量加大,經濟性,污染氣體排放等等的影響,是一個輕便的噪聲處理系統。現在這個系統還在進一步的研發中,他可以用來更好的改善汽車NHV問題,即是行車舒適度。汽車的研發需要用到不同的噪聲檢測儀器,測試數值也需要去到很精準的程度,特別在消聲室的測試尤其重要。精密的噪聲測試儀器,如聲學照相機等等都搭載了適用於汽車噪聲檢測的軟件設備,也是許多汽車製造廠家的首選。

以上圖片: 使用噪聲相機測量交通噪音對居民影響

Norsonic 848A 為聲學照相機確立了新的標準。和傳統的聲學照相機相比,由於它使用了大量的麥克風,所以它消除了鬼影的問題。對於傳統的聲學照相機而言,由於它採用的麥克風相對比較少,所以了它增加了照相機的旁瓣效應,從而導致照相機產生了鬼影:也就是你可能會”測量到”一個並不存在的聲源。

Norsonic 848A的軟件是非常直觀的而且便於操作。在接受培訓幾分鐘以後,使用者就可以操作系統並進行實際的測量。我們可以提供三種碟面的聲學照相機,它們分別有不同數量的麥克風傳感器和不同的碟面尺寸。直徑0.4m的陣列有128個麥克風組成;直徑1.0m的陣列有256個麥克風組成;直徑1.6m的陣列有384個麥克風組成。

所有數碼麥克風單元被置於蝶形炭纖維基座內,並受到防塵和防濕保護網的保護。基座強大而堅固的結構確保所有的麥克風處於正確的位置-這對於聲場測量是非常重要的。內圈陣列中麥克風的細小間距對於高頻測量時降低空間混疊是很重要的。由大量麥克風組成的陣列也有助於提高測量的動態範圍和降低自噪聲。通過所有麥克風對選定方向的信號進行加權平均而得到的信號可以遠遠低於採用單一麥克風測量時候的自噪聲。也就是它可以測量普通聲級計測量不到的聲音。

這個系統可以讓使用者在進行噪聲分析時對現場實時的多 個噪聲源有一個清晰的認識。該系統進入測量現場後數分 鐘之後就可以進行測量。通過在畫面上移動鼠標,你就可以 在實際測量時對選定方向的聲源進行分析和監聽。同傳統的方法相比,這個系統就有助於使用者在短時間內對噪聲 問題進行診斷,這究竟是一種干擾聲源,一類聲學洩漏,還 是一個難以處理的噪聲問題。

作者:深明顧問有限公司自2008年以來一直涉足環境領域。由經驗豐富的環境專家、聲學專家和數碼技術專家組成的團隊,我們精通為公共和私營部門提供一站式的環境、數碼通信及數碼視覺科技服務。通過為客戶提供獨特的智能解決方案,我們充分利用了長達十年的經驗,為跨國公司和政府提供專業服務。 專業知識已發展到空氣和水的質量、噪聲、綠色建築和廢物管理。 憑藉在環境規劃和評估、可行性研究和政策審查、生態設計、監測和審核中廣泛的專業知識,加上追隨世界數碼潮流,深明顧問有限公司已經成熟為領先數碼環境及可持續發展管理的專業顧問。
(網站:https://anewr.com,领英:ANewR Consulting Group,Twitter:ANewR – Everyday Newer,YouTube:https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

聲學小知識—辦公室噪聲你知道多少

吵鬧的辦公室更不用說,有人一直討論交談,就算是普通音量聽久了也會覺得煩躁,打電話也是,但是基本上大家也是明白在辦公室應該盡量壓低聲音,開會有會議室,打電話可以到人少的地方,辦公桌的隔板等等都可以起到隔音的作用。

不過,就算大家都自覺不製造噪聲,也不代表噪聲沒有傷害你的身體健康,那些不容易聽到的噪聲也是在慢慢損害你的身體,那就是低頻噪聲。電腦機箱的嗡嗡聲,中央空調的吹風聲,電梯運作振動的低鳴聲,打印機的運作聲等等,這些都是會讓我們不小心就習慣了的低頻噪聲,它們會給工作帶來壓力,注意力不集中,增加高血壓、心臟疾病的發病,煩躁不安,也許有人喜歡用音樂來掩蓋噪聲,但是這樣聽音樂工作會損害記憶力。

辦公室噪聲的治理也是比較複雜,除了對噪聲源進行測試,隔音也是很重要的。專業的噪聲檢測儀器,可以檢測不同類型的噪聲,隔音效果。

以上圖片: 噪聲振動精密測量儀器

Norsonic 848A 為聲學照相機確立了新的標準。和傳統的聲學照相機相比,由於它使用了大量的麥克風,所以它消除了鬼影的問題。對於傳統的聲學照相機而言,由於它採用的麥克風相對比較少,所以了它增加了照相機的旁瓣效應,從而導致照相機產生了鬼影:也就是你可能會”測量到”一個並不存在的聲源。

Norsonic 848A的軟件是非常直觀的而且便於操作。在接受培訓幾分鐘以後,使用者就可以操作系統並進行實際的測量。我們可以提供三種碟面的聲學照相機,它們分別有不同數量的麥克風傳感器和不同的碟面尺寸。直徑0.4m的陣列有128個麥克風組成;直徑1.0m的陣列有256個麥克風組成;直徑1.6m的陣列有384個麥克風組成。

所有數碼麥克風單元被置於蝶形炭纖維基座內,並受到防塵和防濕保護網的保護。基座強大而堅固的結構確保所有的麥克風處於正確的位置-這對於聲場測量是非常重要的。內圈陣列中麥克風的細小間距對於高頻測量時降低空間混疊是很重要的。由大量麥克風組成的陣列也有助於提高測量的動態範圍和降低自噪聲。通過所有麥克風對選定方向的信號進行加權平均而得到的信號可以遠遠低於採用單一麥克風測量時候的自噪聲。也就是它可以測量普通聲級計測量不到的聲音。

這個系統可以讓使用者在進行噪聲分析時對現場實時的多 個噪聲源有一個清晰的認識。該系統進入測量現場後數分 鐘之後就可以進行測量。通過在畫面上移動鼠標,你就可以 在實際測量時對選定方向的聲源進行分析和監聽。同傳統的方法相比,這個系統就有助於使用者在短時間內對噪聲 問題進行診斷,這究竟是一種干擾聲源,一類聲學洩漏,還 是一個難以處理的噪聲問題。

作者:深明顧問有限公司自2008年以來一直涉足環境領域。由經驗豐富的環境專家、聲學專家和數碼技術專家組成的團隊,我們精通為公共和私營部門提供一站式的環境、數碼通信及數碼視覺科技服務。通過為客戶提供獨特的智能解決方案,我們充分利用了長達十年的經驗,為跨國公司和政府提供專業服務。 專業知識已發展到空氣和水的質量、噪聲、綠色建築和廢物管理。 憑藉在環境規劃和評估、可行性研究和政策審查、生態設計、監測和審核中廣泛的專業知識,加上追隨世界數碼潮流,深明顧問有限公司已經成熟為領先數碼環境及可持續發展管理的專業顧問。
(網站:https://anewr.com,领英:ANewR Consulting Group,Twitter:ANewR – Everyday Newer,YouTube:https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

聲學小知識—機械設備的低頻噪聲處理的重點

人長期在噪聲的影響下生活,會對身體造成嚴重損傷,除了會讓聽力受損,還容易引發突發性疾病,對血管、心臟、神經系統、情緒等等方面都會有影響,所以高噪聲作業場所必須做好噪聲控制,定期給工作人員做好身體檢查。而一般生活、工作環境中的噪聲污染也不可忽視,特別是作為人們休息恢復精神的小區等等的地方。

但是在現代城市快速發展的前提下,各種高樓大廈,生活供水供電等等都需要各種機械設備,這種機械噪聲很多是低頻噪聲,傳播遠,不容易發覺,更是需要主動做好噪聲處理。電梯房噪聲就是其中之一,這類型機械噪聲主要是機房內曳引機驅動運轉、轎廂及配重運行時候的振動聲能量沿結構主承重牆傳播,引起牆體樓板產生共振。曳引設備摩擦,鋼絲的聲音等等都可以通過牆體引起共振傳出機房,所以在噪聲處理中主要以隔音減震為主要方向,隔斷振動和牆體的鏈接,讓機房保持在一個“真空”的環境中運作。現在很多小區建築都採用這種降噪方式,效果明顯。而專業的噪聲檢測儀器有效測試出機械設備噪聲、隔音效果。

以上圖片:噪聲振動精密測量儀器

Norsonic 848A 為聲學照相機確立了新的標準。和傳統的聲學照相機相比,由於它使用了大量的麥克風,所以它消除了鬼影的問題。對於傳統的聲學照相機而言,由於它採用的麥克風相對比較少,所以了它增加了照相機的旁瓣效應,從而導致照相機產生了鬼影:也就是你可能會”測量到”一個並不存在的聲源。

Norsonic 848A的軟件是非常直觀的而且便於操作。在接受培訓幾分鐘以後,使用者就可以操作系統並進行實際的測量。我們可以提供三種碟面的聲學照相機,它們分別有不同數量的麥克風傳感器和不同的碟面尺寸。直徑0.4m的陣列有128個麥克風組成;直徑1.0m的陣列有256個麥克風組成;直徑1.6m的陣列有384個麥克風組成。

所有數碼麥克風單元被置於蝶形炭纖維基座內,並受到防塵和防濕保護網的保護。基座強大而堅固的結構確保所有的麥克風處於正確的位置-這對於聲場測量是非常重要的。內圈陣列中麥克風的細小間距對於高頻測量時降低空間混疊是很重要的。由大量麥克風組成的陣列也有助於提高測量的動態範圍和降低自噪聲。通過所有麥克風對選定方向的信號進行加權平均而得到的信號可以遠遠低於採用單一麥克風測量時候的自噪聲。也就是它可以測量普通聲級計測量不到的聲音。

這個系統可以讓使用者在進行噪聲分析時對現場實時的多 個噪聲源有一個清晰的認識。該系統進入測量現場後數分 鐘之後就可以進行測量。通過在畫面上移動鼠標,你就可以 在實際測量時對選定方向的聲源進行分析和監聽。同傳統的方法相比,這個系統就有助於使用者在短時間內對噪聲 問題進行診斷,這究竟是一種干擾聲源,一類聲學洩漏,還 是一個難以處理的噪聲問題。

作者:深明顧問有限公司自2008年以來一直涉足環境領域。由經驗豐富的環境專家、聲學專家和數碼技術專家組成的團隊,我們精通為公共和私營部門提供一站式的環境、數碼通信及數碼視覺科技服務。通過為客戶提供獨特的智能解決方案,我們充分利用了長達十年的經驗,為跨國公司和政府提供專業服務。 專業知識已發展到空氣和水的質量、噪聲、綠色建築和廢物管理。 憑藉在環境規劃和評估、可行性研究和政策審查、生態設計、監測和審核中廣泛的專業知識,加上追隨世界數碼潮流,深明顧問有限公司已經成熟為領先數碼環境及可持續發展管理的專業顧問。
(網站:https://anewr.com,领英:ANewR Consulting Group,Twitter:ANewR – Everyday Newer,YouTube:https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)

聲學小知識—車廂噪聲問題如何解決

行車舒適度,NHV問題是大家所關心的問題,而車廂內有一種噪聲也很煩人,那就是空調噪聲。

有些車主會覺得開空調就有很大的嗡嗡聲和呼呼聲,其實這可以通過一些技巧降低噪聲的聲量的。空調如果一直開最大風量,出風口的聲音一定是一直很大,出風口噪聲和出風口風速成正比,持續的噪聲會更讓人煩躁,所以將風速調到“自動”,將穩定恆定在23度左右,風速會根據溫度的變化而變化,使得噪聲的音量經常改變,會降低對噪聲的感受。另外,汽車空調出風口適合全部打開,這樣能夠分散噪聲的音量。其次,就是需要定期檢查空調設備是否有灰塵和異物等等產生噪聲。

汽車噪聲是廠商重點處理的問題,很多汽車在出廠的時候NHV性質是已經確定的了,所以NHV研發是製造商一直在優化的。為解決汽車的噪聲問題,必須使用噪聲檢測儀器於整車和發動機異響,還能夠定位噪聲源。而新款的聲學照相機擁有更靈活的配置,幫助解決品質問題。

以上圖片: 噪聲振動精密測量儀器

Norsonic 848A 為聲學照相機確立了新的標準。和傳統的聲學照相機相比,由於它使用了大量的麥克風,所以它消除了鬼影的問題。對於傳統的聲學照相機而言,由於它採用的麥克風相對比較少,所以了它增加了照相機的旁瓣效應,從而導致照相機產生了鬼影:也就是你可能會”測量到”一個並不存在的聲源。

Norsonic 848A的軟件是非常直觀的而且便於操作。在接受培訓幾分鐘以後,使用者就可以操作系統並進行實際的測量。我們可以提供三種碟面的聲學照相機,它們分別有不同數量的麥克風傳感器和不同的碟面尺寸。直徑0.4m的陣列有128個麥克風組成;直徑1.0m的陣列有256個麥克風組成;直徑1.6m的陣列有384個麥克風組成。

所有數碼麥克風單元被置於蝶形炭纖維基座內,並受到防塵和防濕保護網的保護。基座強大而堅固的結構確保所有的麥克風處於正確的位置-這對於聲場測量是非常重要的。內圈陣列中麥克風的細小間距對於高頻測量時降低空間混疊是很重要的。由大量麥克風組成的陣列也有助於提高測量的動態範圍和降低自噪聲。通過所有麥克風對選定方向的信號進行加權平均而得到的信號可以遠遠低於採用單一麥克風測量時候的自噪聲。也就是它可以測量普通聲級計測量不到的聲音。

這個系統可以讓使用者在進行噪聲分析時對現場實時的多 個噪聲源有一個清晰的認識。該系統進入測量現場後數分 鐘之後就可以進行測量。通過在畫面上移動鼠標,你就可以 在實際測量時對選定方向的聲源進行分析和監聽。同傳統的方法相比,這個系統就有助於使用者在短時間內對噪聲 問題進行診斷,這究竟是一種干擾聲源,一類聲學洩漏,還 是一個難以處理的噪聲問題。

作者:深明顧問有限公司自2008年以來一直涉足環境領域。由經驗豐富的環境專家、聲學專家和數碼技術專家組成的團隊,我們精通為公共和私營部門提供一站式的環境、數碼通信及數碼視覺科技服務。通過為客戶提供獨特的智能解決方案,我們充分利用了長達十年的經驗,為跨國公司和政府提供專業服務。 專業知識已發展到空氣和水的質量、噪聲、綠色建築和廢物管理。 憑藉在環境規劃和評估、可行性研究和政策審查、生態設計、監測和審核中廣泛的專業知識,加上追隨世界數碼潮流,深明顧問有限公司已經成熟為領先數碼環境及可持續發展管理的專業顧問。
(網站:https://anewr.com,领英:ANewR Consulting Group,Twitter:ANewR – Everyday Newer,YouTube:https://www.youtube.com/channel/UCnpvmxnR9hbNxytSfBdfV8Q/videos)