Wireless Noise Surveillance System

What is Sound Noise?

Noise is defined as unwanted, unpleasant or loud sound, and it becomes harmful when it exceeds a certain level of volume. Noise risks may be underestimated as they are invisible.
However, exposure to noises over the long term causes adverse effects to Health, Safety and the Environment (HSE) of people and their communities. Today noise is one of the major environmental issues that we should be concerned about.

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Sound Noise in the Industry

Noise is one of the most common occupational risks in the industrial workplace. The machines and equipment used in plants generate high levels of noise. The louder the noise and the longer workers are exposed to it, the more health-related risks they will have. Thus, noise monitoring is extremely important to ensure HSE for both the workers and neighboring communities.
The most well-known problem due to noise exposure is hearing damage, but noise also negatively impacts worker productivity.
To prevent hearing damage, many countries have regulations that impose limits on the amount of noise levels and working time allowed in the workplaces. This not only protects workers’ HSE, but also optimizes worker productivity. To achieve the safest and most effective work schedule in the workplace, maintaining appropriate noise levels is indispensable.

 

Noise Mapping and its Challenges Today

In order to assess noise levels in plants, paper-based noise maps are commonly used. The paper-based noise maps are manually created by measuring noise levels at different locations in the plant with handheld sound level meters. It is crucial to obtain the reliable and accurate noise levels in order to successfully implement noise monitoring measures. However, because of the measuring method, paper-based noise maps have major challenges, including:

  • Only being updated about once every 4 years due to extremely time-consuming manual work
  • Being unable to reflect timely and accurate noise levels in the maps due to continual changes in the operation conditions, the type and age of equipment, or the time of day

Noise monitoring with the noise maps created under these challenges could disrupt work schedules which ensure workers’ HSE.

 

Driving Sustainable HSE with Digitalized Real-time Noise Monitoring

To solve the challenges in paper-based noise maps, Yokogawa has developed an innovative “wireless noise surveillance system”. The principal components of this system are the WN100 wireless sound level meter and the WN30 noise map software. Compliant with the ISA100 Wireless network protocol, this system monitors and maps noise levels in real time throughout a workplace.

 

  Poor risk management in worker HSE Unoptimized work schedules Social effects

Paper-based Noise Maps

Challenge 1:
Poor Risk Management in Worker HSE
Challenge 2:
Unoptimized Work Schedules
Challenge 3:
Social Effects
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  • Inducing noise-related issues, especially hearing damage
  • Increasing workers’ compensation for noise-related issues
  • Lowering worker productivity
  • Loss of production
  • Negative impacts on communities
  • Creating a negative company image
Yokogawa
Benefits
  • Ensuring worker HSE
  • Lesser liability
  • Optimizing worker productivity
  • Maximizing equipment uptime
  • Ensuring permissible noise limits in residential areas
  • Contributing to Sustainable Development Goals (SDGs)
Yokogawa
Features
  • Real-time noise monitoring
  • Fully integrated digital noise sensor network
  • Data transmission to the server by ISA100
  • Creating real-time noise maps by the software
  • Superimposing the real-time noise map on an actual map
Outcomes
  • Improved worker HSE
  • Workforce utilization
  • Cost control and optimization
  • Enterprise compliance
  • Risk reduction/response
  • Free of significant manual work for noise map creation

* Some graphs and images are quoted from the eBook ("Manage your Noise Exposure; Amplify Productivity, Health and Safety") created by Frost & Sullivan.

Details

Challenge 1

Poor Risk Management in Worker HSE

Poor risk management in worker HSE

Noise levels vary significantly depending on the operation conditions, and the type and age of equipment. In order to protect workers’ HSE from noise-related issues, there is a need for real-time noise monitoring which can keep up with continual changes in the noise level.
Risk assessment is conventionally conducted using paper-based noise maps which are manually created by measuring noise levels with handheld sound level meters. However, hearing damage issues still remain. This is because timely assessment based on ongoing noise level is impossible as the paper-based noise maps are only being updated about once every 4 years due to the manual work required.
The hearing damage issues tremendously impact social and economic costs. If not handled correctly, it could result in serious amount of compensation and hit your business hard.

Noise Map in Relation to Equipment Type
Noise Map in Relation to Equipment Type
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Yokogawa Benefits

  • Ensuring worker HSE
  • Lesser liability

 

A New HSE Solution with Real-time Noise Maps

Multiple WN100 wireless sound level meters can be installed throughout a workplace to measure the noise level in real time. The measurement results are transmitted to the server by using industry standard ISA100 Wireless network protocol. From the measurement data, WN30 noise map software creates a real-time noise map that can be superimposed on an actual site map.
Workers can check the actual noise levels before heading to the workplace through the real-time noise map. Based on the noise levels, workers can take necessary measures such as limiting their work hours and using earplugs or earmuffs. Yokogawa’s wireless noise surveillance system is a new HSE solution that helps to prevent workers’ hearing damage.

Paper noise map / Digital noise ap

Challenge 2

Unoptimized Work Schedules

Unoptimized work schedules

Many countries and companies - especially in the oil and gas industry which requires work under harsh environments - impose restrictions on working time under noisy conditions and set maximum permissible noise levels. Creating an accurate noise map with real-time noise monitoring is essential not only to ensure workers’ HSE but also optimize worker productivity. However, conventional paper-based noise maps are manually created by measuring noise levels with handheld sound level meters. Due to significant manual work requirements, the paper-based noise maps are only being updated about once every 4 years. Therefore, in realty, the accuracy of the maps is low, and productivity is hard to be optimized.

Unoptimized work schedules
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Yokogawa Benefits

  • Optimizing worker productivity without violating the regulations
  • Monitoring equipment conditions to detect anomalies and malfunctions

 

A Proactive Noise Management

Multiple WN100 wireless sound level meters can be installed throughout a workplace to measure the noise level in real time. The measurement results are transmitted to the server by using industry standard ISA100 Wireless network protocol. From the measurement data, WN30 noise map software create a real-time noise map that can be superimposed on an actual site map.
This wireless noise management solution helps you proactively manage noise levels and design the most effective work schedules to optimize work productivity.

A Non-intrusive Tool for Anomaly Detection

Noise is a hidden health indicator of equipment. Unplanned shutdown caused by equipment anomalies or malfunctions could cause expensive operational downtime. In order to prevent such serious situation, you may use this high-quality noise data as a prediction tool to detect anomalies in equipment. Detecting equipment anomalies in early stage could lead to huge OPEX savings.

Challenge 3

Social Effects

Social effects

Noise impacts not only workers but also community health, wellness and wellbeing. Companies are fully responsible for taking measures to maintain a good quality of life for both individuals and communities. Failure to do so can result in a negative impact on your company’s reputation. Nowadays, society pays more attention to the role of companies. Minimizing the negative impacts of your business on society is important. Moreover, creating value other than profits is important.
It is vital that companies be proactive about risk management to enhance Corporate Social Responsibility (CSR) initiatives and achieve Sustainable Development Goals (SDGs).

 

Yokogawa Benefits

  • Ensuring permissible limits in residential areas
  • Proactive approach to enhance Corporate Social Responsibility (CSR)
  • Contributing to the Sustainable Development Goals (SDGs)

Social effects

 

Becoming a Socially Responsible Company

Noises generated from plants impact the quality of the surrounding community, making boundary noise monitoring necessary. Yokogawa’s wireless noise surveillance system can be installed outdoors to monitor noise levels and manage noise emissions in residential areas near plants. This system makes it possible for your company to implement proactive real-time noise management. With this proactive approach, the goal of noise management, which keeps noise exposure to workers and communities as low as possible, will be achieved. Yokogawa’s wireless noise surveillance system is a solution that makes a real difference and provides positive social value.

 

Contributing to SDGs 3 and 8

Yokogawa's wireless noise surveillance system enables the automatic measurement of noise distribution and real-time mapping. By using the digitizing noise map, noise distribution can be more accurately grasped, which leads to a reduction in the risk of workers’ hearing damage. Yokogawa makes a proactive contribution to the SDGs through our innovative solution. Incorporating the SDGs into your business will help you gain trust from the local community.
Yokogawa contributes to the improvement of your workers’ HSE and delivers outstanding new value for your business.

2020 Yokogawa Sustainability Report

2020 Yokogawa Sustainability Report
Download All Pages (PDF: 5.3MB)

System Overview

Yokogawa’s wireless noise surveillance system provides two types of system configuration, complete solution and package solution, which can be chosen according to your requirements.

 

Complete Solution

This complete solution consists of two main components. One is a wireless sound level meter (WN100) which is an explosion-proof audio sensor with ISA100 wireless technology, and the other one is noise map software (WN30).  WN30 processes the noise data collected by a group of WN100 allocated in the area and indicates a noise map on the display.
WN100 measures noise levels, and the measurement results are transmitted to the server using a wireless network. From the measurement data, WN30 noise map software creates a real-time noise map and superimposes it onto an actual site map. This solution uses an ISA100 field wireless infrastructure.

Complete Solution
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* Click here for details on the "YFGW410 Field Wireless Management Station"
* Click here for details on the "YFGW510/YFGW520 Field Wireless Access Point"

 

Package Solution

This package solution consists of one or more wireless noise meter (WN100) and Device Type Manager (ISA100 DTM) for WN100 which is a standard package of FieldMate software. WN100 and DTM (PC) can be connected through ISA100 field wireless infrastructure, or they can be connected directly with infrared interface. DTM has a sound level viewer function to display frequency-weighted sound pressure level for point measurements. It also has an octave band viewer function to display 1/3 octave band spectral analysis.

Package Solution
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WN100 Wireless Sound Level Meter 

WN100 measures three frequency-weighted sound levels, which are LAeq,T, LCeq,T, and Lcpeak, complying with IEC 61672.
WN100 is battery operated and it works consecutive two years before changing batteries. WN100 can be installed in the field as it has IP55 (Ingress Protection rating) protection. Consequently, it can be used to monitor the sound levels in the vicinity as well as inside of the plant. 
WN100 uses ISA100 Field Wireless infrastructure to transmit the collected sound data to a monitoring room.
The customers who have ISA100 infrastructure in the plant can use the existing asset for the data transmission of WN100.  Those customers who don’t have ISA100 infrastructure are required to install YFGW510/YFGW520 Field Wireless Access Point and YFGW410 Field Wireless Management Station in the plant.

WN100 wireless noise meter

Complete Solution

Multiple units of WN100 are required to create the Complete Solution of Wireless Surveillance System. Required number of units depends on the size of monitoring area and arrangement of equipment. However, minimum 5 units of WN100 are recommended to monitor in narrow area. Maximum 100 units of WN100 are available to install to monitor in large area.

 

Package Solution

When WN100 is used to monitor the sound level of a target machine or designated spot area, sound data on the individual WN100 is analyzed. So, single unit of WN100 can be configured. Sound data collected by a WN100 is analyzed using FieldMate software, in which DTM is working, installed in a PC. FieldMate can display 1/3 octave band spectrum analysis as well as showing sound level on the screen. When DCS or a data acquisition tool is connected to YFGW410 by MODBUS interface, sound level monitor is available.
Specially designed antivibration stage provided in the bottom of WN100 absorbs vibration from the floor. This is critical when monitoring very low sound levels.

WN30 Noise Map Software

WN30 enables you to grasp sound levels by color scale or numerical values via WN100s throughout a plant via a network connection. 
In the plant, multiple units of WN100 wireless sound level meter are placed at specific locations to measure the noise levels in real time. 
From the measurement data, WN30 creates a noise map in real time and then superimposes it onto an actual site map. 
WN30 stores noise maps in its database so that workers can browse or compare the noise maps whenever needed. 
Based on the latest noise map created by WN30, workers can assess the actual noise level that they will be exposed to in the plant. Depending on the noise level, workers can take necessary measures such as planning optimal work schedules and using appropriate hearing protection. For HSE managers and plant managers, they can review and approve the working schedule based on the latest noise levels.

Noise Map Image
WN30 noise map software
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ISA100 Device Type Manager (DTM) for WN100

ISA100 DTM for WN100 is a Device Type Manager (DTM) to be used with WN100 wireless sound level meter. This DTM is a standard package of FieldMate software which is installed in a PC.
The sound data of WN100 is transmitted to FieldMate via ISA100 Field Wireless infrastructure, or directly transmitted to FieldMate via infrared interface.
ISA100 DTM for WN100 has a simple viewer function of 1/3 octave band spectral analysis, and the data can be displayed on the viewer without WN30 noise map software. This DTM also has a sound level viewer to display frequency-weighted sound pressure level. Both can be used for point measuring using WN100. Log data for both sound level and octave band can be saved in CSV format.

WN100 ISA 100 Device Type Manager (DTM)
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* Click here for details on the "FieldMate Versatile Device Management Wizard"

 

Sound Level Viewer

The viewer displays numerical data log, bar chart and frequency-weighted sound pressure level of WN100.

Sound Level Viewer
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Octave Band Viewer

The viewer displays numerical data and bar chart of 1/3 octave band spectral analysis of WN100.

Octave Band Viewer
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Specifications

WN100

Item Specification
Wireless Specifications Communication Protocol ISA100.11a (IEEE802.15.4)
Data Rate 250 kbps
Frequency 2400 - 2483.5 MHz
Radio Security AES 128 bit
RF Transmitter Power Less than 10.0 dBm (EIRP)
Antenna +2 dBi Omni directional monopole type
Functional Specifications Frequency-Weighted Sound Pressure Level Measurement Parameters:
LAeq,T (Time-averaged, A-weighted sound level)
LCeq,T (Time-averaged, C-weighted sound level)
LCpeak (C-weighted peak sound level)
Level Range
From typical noise fl oor to maximum level
Sinusoidal electrical signal of 1 kHz
LAeq,T: 60 to 140 dB
LCeq,T: 70 to 140 dB
LCpeak: 80 to 143 dB
Linear Operating Range
In accordance with IEC 61672 class 2
Sinusoidal electrical signal of 1 kHz
LAeq,T: 75 to 140 dB
LCeq,T: 80 to 140 dB
Measurement Accuracy:
In accordance with IEC 61672 class 2
Averaged response from all directions in a horizontal
plane by sinusoidal acoustical signals
LAeq,T: Within acceptance limits of A-weightings
LCeq,T: Within acceptance limits of C-weightings
Spectral Analysis 1/3 Octave Band Center Frequencies:
25 Hz to 16 kHz (29 bands)
Level Range:
From typical noise fl oor to maximum level
25 Hz to 8 kHz bands: 60 to 140 dB
10 kHz, 12.5 kHz bands: 65 to 140 dB
16 kHz band: 70 to 140 dB
Measurement Accuracy:
Averaged response from all directions in a horizontal
plane by sinusoidal acoustical signals
40 Hz to 2 kHz bands: ±3 dB
25 Hz, 31.5 Hz, 2.5 kHz to 16 kHz bands: ±5 dB
Measurement Time Interval (Measurement Period) 10 to 600 s
Power Supply Specifications Battery Pack the dedicated battery pack
2 primary lithium-thionyl chloride batteries
Battery Life 2 years under the following conditions
1 minute measurement interval
Ambient temperature: 23±2°C
Sound level measurement: LAeq,T, LCeq,T , LCpeak only
Installation Environment Ambient Temperature Limits Operating: -20 to 70°C
Storage: -25 to 70°C
Vibration Resistance Mechanical vibration from an installed environment significantly affects to the sound level measurement.
In combination with the dedicated antivibration stage,
LAeq,T can be measured down to around 65 dB under the vibration of 4 m/s2 rms at a typical offshore platform.
Horizontal Attitude Tilt angle limit of the anti-vibration stage: ±6°
Degrees of Protection Degrees of Protection IP55
Regulatory Compliance Statements CE Conformity RoHS Directive
ATEX Directive
RE Directive

 

Specifications

WN30

Item Specification
Noise map source LAeq (Time-averaged, A-weighted sound level)
LCeq (Time-averaged, C-weighted sound level)
LCpeak (C-weighted peak sound level)
Noise map viewing Live mode (minimum 1 min. update)
Archive mode
Noise map viewer Web browser
Other Major functions Spectral analysis (1/3 Octave band)
Message indication from Administration user
Interface PI System

Specifications

DTM

Item Specification
Sound Level Viewer Function Frequency-Weighted Sound Pressure Level LAeq,T (Time-averaged, A-weighted sound level)
LCeq,T (Time-averaged, C-weighted sound level)
LCpeak (C-weighted peak sound level)
Refresh Interval Fixed to every 60 seconds or manually updated
Number of Log Displays Up to 30 logs
Log Output A CSV file format output is possible (manually)
Octave Band Viewer Function 1/3 Octave Band Center Frequencies 25 Hz to 16 kHz (29 bands)
Refresh Interval Fixed to every 60 seconds or manually updated
Number of Log Displays Latest 1 log
Log Output A CSV file format output is possible (manually)

Work Digital Control

rap

Yokogawa RAP has been recognized as a leader in Digital Control of Work.  Control of Work by definition encompasses PtW (Permit to Work), RA (Risk Assessment) /JHA (Job Hazard Analysis) and Isolations. 
The RAP software solution provides a smart system of simple, clear, intuitive modules, with the intelligence to assure complete Control of Work compliance with cost efficiencies to drive continuous Safety Improvement while providing Layers of Safety for all industries, all scales and all risks.
RAP’s digital Risk Assessment and Permit to Work system offers a unique icon-based design ensuring that all rules and controls are easily applied, and its wide range of configurations will adapt to any workflow – providing safe and cost-efficient Control of Work.
The system is built around a large configurable Risk Assessment knowledge base called the RAP Cortex, incorporating hundreds of years of firsthand job knowledge. This information is broken down into categories represented by icons, allowing for simple and speedy navigation.  Digital permits are built around this core, categorized by site area, and tracked from the initial definition stage right through to permit issue and completion.

* Click here for details on the "Work Digital Control"

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