Noise Supervision and Control

1
Noise Supervision and Control

• By
• Ramón Garcia Gomez
• Jose Elias Arias Puga
• Pd de Audio
• Phone[phone]
• Fax [phone]
• e-mailpdaudio_at_ecudap.com

2
Index

• The noise problem
• What is the problem
• Who it affects
• Environmental noise management systems
• What it is an ENMS
• How to implant an ENMS
• Pd audio in ENMS
• Remote hw equipment
• Sw applications for ENMS and data collection

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The Noise Problem

• Noise produce physiological effects (deafness,
  changes in the cardiac rhythm, breath rhythm,
  arterial tension.....)
• And psychological effects (nervousness, stress,
  problems for paying attention, effects on
  sleep,......

4
The noise factor

• Noise is a subproduct of Economical activity
• Technological factors increase the noise levels
  (PA more powerful at cheaper prices)
• In leisure activities the changes of habits
  increase the nuisance levels
• Citizen sensitivity

5
The noise problem

• According to the Green Paper of the EU on future
  politics against noise around 20 of inhabitants
  of the EU suffer a noise level that the health
  professionals consider unacceptable
• This means around 80 million people

6
The noise problem

• Another 170 million live in grey areas where
  the noise causes important problems during day
  hours.
• The cost of the noise effects for the citizens
  was evaluated between 0.2 and 2 of the GIB

7
The noise problem in the EU

• Objectives of regulationTo establish
  environmental objectives, which are quantifiable
  and at the disposition of all interested parties.
• to preserve urban noise environment
• to demand construction standards
• regulation of sound transmission levels
• to establish legal framework for general
  procedures for noise environment management
  procedures
• to inform to the citizens about the noise they
  suffer
• The EU Green Paper on Noise establish the
  obligation of the administrations to inform the
  citizen about the noise levels that they suffer
  and to take steps in order to reduce the emission
  of noise levels by different sources.

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Environmental noise management systems, ENMS

• Defined according the ISO 14000
• Objectives
• To accredit noise environment quality
• To grant the accomplishment of the environmental
  noise policies and quality objectives
• Requirements
• To define quality standards by law
• To establish corrective measures
• To define an effective monitoring and survey
  procedure
• To establish a correction method of the
  deviations with respect to the established
  objectives.

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ENMS -1

• To implant an ENMS according ISO 14000
• To define an environmental policy
• To establish noise environment objectives
  (quantifiable and at the disposition of the
  interested parties)
• To define a noise environmental regulation law
• To name those responsible for achieving the
  objectives
• To define the means necessary for achieving the
  objectives
• To measure and record continually the significant
  environmental parameters
• To establish a systematic auditory plan
• To provide means for periodic revision of the
  efficiency of the NMES.

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ENMS -2

• Sources of environmental noises
• Produced by public activities (bars, discos,
  enterprises...).
• Permanent noises
• Air machines
• Fans
• Machines in general
• Noises whose levels can be manipulated.
• Emissions from PA systems
• Which are produced by the people inside premises
• Produced by traffic, aeroplanes... this noise
  can be measured but is not directly controlled
  (only planning actions can be taken or noise
  barriers against theses noises)

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ENMS -3

• The maximum emission level is fixed by law
• Strategies for controlling the noise
• Controlling the sound emission level of the
  sources (frequency dependent) Active
  soundproofing
• Treatment of the wall facings by means of passive
  elements, in order to modify transmission
  characteristics so that they produce the
  necessary reduction of transmitted noise Physical
  soundproofing (Passive)
• Basic equation
• Premises level (frequency dependent)lt acoustical
  insulationmaximum
• permitted level.

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ENMS -4
Basic equation Premises level (time varying
frequency dependent) lt attenuation of walls
(frequency dependant) maximum permitted level.
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ENMS -5

• Controlling the signal level of the loudspeakers
  (frequency dependent)
• This control also reduces the noise level
  produced by the people inside the premises.
• Maintaining the sound level inside the premises
  below the maximum spectrum guarantees the
  compliance with legal requirements

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ENMS -6

• Controlling the noise inside the premises
• Advantages cheaper,(the noise can be measured
  inside their premises where the levels are
  higher)can be integrated in all the situations.
• Can be verified with the proper inspection system
  The walls attenuation is frequency dependent
• The music, speech and other audio signals have a
  short time varying spectra
• The optimum control following the basic equation
  has to be done in real time and for all
  frequencies

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ENMS -7

• Licence procedure
• Measurement of the acoustic characteristics of
  the premises
• Granting the working license in function of the
  maximum noise spectrum
• Monitoring the activity by a black-box which
  reports the noise (sound) activity

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ENMS -8

• Black-box requirements
• To Measure and store the noise conditions
  periodically (programmed)
• To Incorporate a system that allows the Local
  Authority Engineering Department to collect the
  data (in safe conditions).
• This strategy of continuos survey impose the
  necessity of a protective device.

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Pd Audio in ENMS-1

• Monitoring terminals
• SDR-100
• Noise emission control and monitoring terminals
• EQD 50SRE
• EQD 100
• Data collection systems GSM based, PSTN,
  portable terminals
• GestionSDR, software system for information
  processing

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Pd Audio in ENMS-2

• SDR-100
• It is a black-box which reports the noise (sound)
  activity
• To Record and store the noisy periods of premises
• To Record and store the sound levels of noisy
  periods.
• To Incorporate a system which allows the Local
  Authority Engineering Department collect the
  data, which will be neither destructive nor
  permit untoward tampering.
• Necessary protective device

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Pd Audio in ENMS-3

• Noise emission control and monitoring terminals
• EQD 50SRE
• EQD 100
• They are predictive algorithm devices
• They work in line and profit from the advantages
  of the direct loop and feedback loop devices
• The discriminator is a programmable algorithm
• They use the characteristics of the premises as
  data calculations
• They work in a spectral way
• It maintains the music spectrum below the
  maximum noise spectrum of the room
• It facilitates the control and the inspection of
  the installations

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Pd Audio in ENMS-4

• The EcuDap EQD-100
• It is an adaptive equaliser which maintains the
  spectrum level below the maximum of the room in
  which it is installed
• It guarantees that at all times the noise level
  transmitted to the surroundings is that permitted
  by law

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Pd Audio in ENMS-5

• EcuDap EQD-50 SR
• They are adaptive loudness controls
• The working evaluation is spectral
• They always maintain the sound level inside the
  room below the maximum legal level

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Pd Audio in ENMS-6

• Data collection systems GSM based, PSTN,
  portable terminals
• communication software packages

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Pd Audio in ENMS-7

• GestionSDR, software system for information
  processing

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Pd Audio in ENMS-8

• Pdaudio by means of its distributing companies
  offers data management and collection of all
  activities existing in any council district.
• Pd Audio solution offers
• Integrated solution
• Cost effective solution (for implementing and
  exploiting)
• Provide all the tools you need for implementing
  an ENMS.