At Geonoise we have instruments for various vibration measurements:
Author: Webmaster
Ever wondered what is the sound absorption of your absorber in situ?
SONOCAT
A multifunctional acoustic device for in-situ measurements.
Sound absorption of a material can now be measured in the field. It is well known that, normally, sound absorption measurement needs to be done in a reverberant sound field and controlled environment such as a reverberation chamber referred to the traditional method, for example, ISO 354. The reason is the measurement method relies on the sound field inside a reverberation chamber which cannot be obtained in situ.
Sonocat measures 3D sound waves, meaning that the equipment can distinguish between the incident wave, reflected wave, and the total or the active sound wave. This overcomes the limit of relying on the sound field when measuring sound absorption and sound transmission loss, allowing the acousticians to investigate these acoustic parameters in the field.
Sonocat can be useful in many cases, for example, when the test object cannot fit in the facilities or when it’s already installed at the site. Imagine a noise barrier that has been next to the highway for ten years, and the acoustic engineer needs to inspect whether the performance is still well-maintained. It won’t be possible to move the barrier to a lab, this is when in-situ measurement devices become handy. The engineer will be able to inspect the current performance of the absorption material inside the barrier as well as the sound transmission loss of the barrier, they can also use this to study the life span and plan for their next maintenance.
With the capability of measuring 3D sound waves, Sonocat can also be used to locate the sound source or the leakage point. This can be useful for those who work in the automotive industry, for example, inspecting the vehicle to find the correct spot that causes noise intrusion problems and deciding the most effective solution.
On October 1st, we have started collaborating with Geonoise to expand product sales in Thailand.
With two dedicated Geonoise staff members, we will be able to provide even faster and more detailed support to our Thai customers.
If you have any problems with sound level meters or vibration meters, please feel free to contact us.
Address
6/54-56, Poemsin Road Soi 42 Sai Mai, 10220 Bangkok Thailand
Phone number
+66 2 121 4399
(Monday to Friday / 9:00 a.m. – 5:00 p.m.)
Email
info.thai@rion.co.jp
Function introduction: Rule-based rotor management
Rule-based rotor management：
The system-integrated ISO norms 10816/20816/2372 are applied for all rotating machinery (Motors, Compressors, Pumps) from Semiconductor to conventional manufacturing industries.
No need to memorize machines’ criteria values, users can configure the respective regulation criteria according to the power consumption range. Machine health hierarchies are sharp color-coded, and users get to have a glance at the whole plant machine condition by Good, Satisfactory, Unsatisfactory, and Unacceptable levels.
Function introduction: AI degradation inference trend
AI degradation inference trend : (Optional)
Leveraging 25 parameters accumulated and through an AI cross-comparison algorithm, this function not only tells the current degradation level but also the future degradation forecast in 7 days. Intuitive coloured displays level machines in Normal, Light, Moderate, and Dangerous, according to which users can schedule and plan maintenance ahead of time for the preparation of spares to avoid long delivery.
With all the development, industrial activities and community activities in Indonesia, noise has become one of the problems that arises in some places in Indonesia. Indonesia already has some regulations, guidelines, and standards to safeguard the noise levels. This is important mainly to support a healthy environment for the people, and also to improve budgeting certainty of projects that will produce noise during their operations.
The following are the regulations, standards and guidelines related with environmental noise in Indonesia.
Environmental Noise Regulations
Regulations regarding environmental noise generally can be categorized into two types which are emission regulation and immission regulation. Emission regulations regulate how much noise can a noise source produces noise, while immission regulation regulates how much noise can a receiver or area receives noise.
Examples of noise emission regulations in Indonesia are:
- Decree of Minister of Environment and Forestry No. 56 year 2019 (P.56/MENLHK/SETJEN/KUM.1/10/2019) regarding noise limits of new types of motorized vehicles and in production M category, N category, and L category.
- Decree of Minister of Transportation of Republic of Indonesia No. PM 62, year 2021 regarding civil aviation safety section 36 regarding noise standard dan type certification and aircraft airworthiness
The two ministerial decrees above regulate how much noise can be produced by vehicles that are used on road and aircraft that can operate within Indonesian territory.
The regulation that regulates environmental noise level at the receiver is:
- Decree of Minister of Environment No. 48 year 1996 about noise level limits
The decree states the noise limits that are allowed for the receiver according to its function – for example for residential area, the noise limit is 55 dBA and for industrial area 70 dBA. More details on the following link: https://www.konsultasi-akustik.com/en/environmental-noise-measurement/
Beside the regulations above, there are other requirement such as one written on Government Regulation (PP) No. 36 year 2005 regarding implementation rules of the Law No. 28 year 2002 regarding buildings. One of the points require noise reduction means for toll roads in residential area or existing city centers.
Guidelines regarding Environmental Noise
Beside the regulation, there are some technical guidelines that are written by Ministry of Public Works as follows:
- Technical guidelines Ditjen Bina Marga No. 36 year 1999: Noise barrier planning guidelines
In these guidelines, criteria to categorize area as safe, moderate and high risk are given. Moreover, the guidelines also state measurement techniques for measurement beside road and common type, shape and material of noise barriers. - Construction and building guidelines Pd T-10-2004-B: Road traffic noise prediction.
These guidelines adopt calculations from Calculation of Road Traffic Noise (CoRTN, UK, 1998) which contain noise calculation method based on traffic volume and speed. There are also corrections for heavy vehicle percentage, speed, gradient and road surface. From this calculation, propagation to receiver can be calculated considering distance, screening, reflection and angle of view.
- Construction and building guidelines Pd T-16-2005-B: Mitigation of road traffic noise
The guidelines lay out methods to mitigate noise from traffic which is based on measurement (which are written on Permen LH No. 48 year 1996 and guidelines No.36 year 1999 above) and can also be based on predictions (Following construction and building guidelines Pd T-10-2004-B)
Environmental Noise Standards
Beside the regulations and guidelines, there are Indonesian National Standard (SNI) document that are written by National Standardization Body (BSN) that are related to environmental noise:
- SNI 19-6878-2002 – Road traffic noise test L10 and Leq
This standard contains test method which state testing procedure and data processing steps to calculate LA to L10 and Leq - SNI 8427:2017 – Pengukuran tingkat kebisingan lingkungan
This standard contains measurement method that is similar to Kepmen LH No.48 year 1996 which is to measure noise samples for 10 minutes across 24 hours period. Noise levels then can be calculated based on its time slice which are Ls (daytime noise), Lm (nighttime noise), and Lsm (day-night noise, with 5 dB penalty for nighttime).
