Sound level meters DELTAOHM

� Machines Directive 2006/42/CE – ISO 3741,3743, 3744, 3746� Occupational noise – ISO 9612/2011– UNI 9432/2008 - D.Lgs. � Occupational noise – ISO 9612/2011– UNI 9432/2008 - D.Lgs. 81/2008 � Environmental noise – Directive 2002/49/CE – Italian D.M. 16/3/1998� Sound insulation – ISO 140x - ISO 717 - UNI 11367/2010

� HD 2010UC integrating sound level meter Type 1 or 2� HD 2010UC/A integrating SLM/analyser Type 1 or 2� HD 2110L integrating SLM/analyser Type 1

Integrating sound level meter HD 2010UCIntegrating sound level meter HD 2010UCOccupational noise Occupational noise –– Machines Machines –– Monitoring Monitoring –– Vehicle Vehicle noise noise

Technical Specifications

IntegratingIntegrating soundsound levellevel metermeter withwith ½”½” freefree fieldfieldelectretelectret condensercondenser microphone,microphone, detachabledetachablepreamplifier,preamplifier, forfor freefree fieldfield andand diffusediffuse fieldfieldmeasurementsmeasurements (software(software correction)correction);;According to IEC 61672 type 1 or 2 (I.N.RI.M.type approved).

Corrections for random field measurements andCorrections for random field measurements andfor windshield or all weather environmentalprotection use.

Dynamic range: 30dB – 140dB

Linearity domain: 80dB

Options:– Data Logger– Advanced analyser

Dynamic range HD 2010UCDynamic range HD 2010UCNoise source Subjective evaluation dB

Jet fighter Takeoff at 30m 140

Gunnery at 3m 130

Clenching machine Deafening (pain) 120

Motorycle accelerating (few meters) 110

Clacson 100

Noisy urban road Very strong 90

60-1

40

50-1

30

40-1

20

30-1

10

HD 2010UC HD 2010UC Safety Safety –– Machines Machines –– Monitoring Monitoring –– Vehicle NoiseVehicle Noise

Noisy urban road Very strong 90

Noisy pub strong 80

Train at 30m 70

Road traffic noise (fluid) moderate 60

Normal conversation 50

TV low volume light 40

Residential area 30

burring of bug at 1m 20

Rustle of a leaf Very light

20µPa

10

Udibility threshold 0

Integrating SLM HD 2010UCIntegrating SLM HD 2010UCMeasures 3 parameters with parallel timeconstants F, S, I and frequency weightingA, C and ZDescriptors: Lpk, Leq, LI,eq, Lp, Lpmax, Lpmin, Ln, LE

Fast time profile acquisition 1/8s of L AFp


Recording of 500 single measurements

Data logging:– Single integration:

• LAFp 125ms + 3 parameters 0.5s – Multiple integration from 1s to 1 hour:

• 3 parameters from 1s to 1 hour– Reports:

• 5 parameters from 1s to 1 hour• LN statistic (percentiles)

Integrating SLM HD 2010UCIntegrating SLM HD 2010UCComplete statistic analysis:

– Probability distribution– LN Percentile calculation from L1 to L99.

Noise events identification:– Activation and de-activation thresholds– Duration filter– Pre and post trigger intervals


Integrating SLM HD 2010UCIntegrating SLM HD 2010UC

APPLICATIONS

Machine Sound Power measurements:– ISO 3741, 3743, 3744, 3746

Occupational noise measurements:– D.Lgs. 81/2008 and UNI 9432– Impulsivity index evaluation

USE Limitations

– Only global measurements (nospectra)

– Evaluation of PPE efficiency withSNR or HML methods


– Impulsivity index evaluation

Environmental noise (Monitoring)– Noise mapping, European

Directive 2002/49/CE and D.Lgs. 194/2005

– Road traffic noise, railway andAirport noise,

– D.M. 16/03/1998 (partialconformity)

– Impulsive noise identification

– No spectrum analysis > NO tonalcomponents identifications

Integrating SLM/Analyser HD 2010UC/AIntegrating SLM/Analyser HD 2010UC/A

TECHNICAL SPECIFICATIONS

Integrating Sound Level Meter withsame specs than HD 2010UCconforms IEC 61672 type 1 or 2I.N.RI.M type approved

HD 2010UC/A HD 2010UC/A Safety Safety –– Building acoustic Building acoustic –– Sound insulation Sound insulation ––Machines Machines -- Monitoring Monitoring –– Vehicle Noise Vehicle Noise

1/1 and 1/3 Octave SpectrumAnalyser according to IEC 61260type 1

– Octave bands 32Hz-8 kHz– Third Octave bands 25Hz-

12.5kHz.Options:

– 1/3 octave bands – Reverberation time

measurement– Advanced Analyser

Data logging:– Single integration:

• LAFp 125ms + 3 parameters at 0.5s sampling

– Multiple integration from1s to 1 hour:• 3 descriptors• 1/1 and 1/3 octave bands



– Reports from 1s to 1 hour:• 5 parameters• 1/1 and 1/3 octave bands• LN percentile statistics

Reverberation Time measurements from100Hz to 10kHz (from 125Hz to 8kHz in1/1 octave bands):

– Interrupted noise method– Impulse response method with

Schroeder’s back integrationcalculation

APPLICATIONSMachine’s Sound power measurements:

– ISO 3741, 3743, 3744, 3746

Sound insulations

Occupational noise measurements:– ISO 9612 - D.Lgs. 81/2008 - UNI 9432– Impulsivity index

LIMITATIONS OF USE

– 1/3 octave Spectral anlysis limited from 25Hz to 12.5 kHz



– Impulsivity index

Environmental noise measurements– Noise Mapping, Directive 2002/49/CE– Road traffic noise, railway and airport noise– D.M. 16/03/1998 (partial conformity)– Community noise

Building acoustics– ISO 140 measurements

Architectural acoustic– UNI 33821 and UNI 3382-2

– Identification of tonal components withstandard 1/3 octave bands (no shifted 1/3octave bands).

– Clarity, Definition and Lateral Energycalculation not possible (ISO 3382-1)

Integrating SLM/Analyser Integrating SLM/Analyser HD 2110LHD 2110LTECHNICAL SPECIFICATIONS

Integrating Sound Level Meter with ½” free fieldpolarized 200V microphone , detachable preamplifier,for free field and random field measurements (softwarecorrection);Conforms to IEC 61672 type 1 (I.N.RI.M type approval)

1/1 and 1/3 octave Spectrum analyser;Conforms IEC 61260 type 1

– Octave bands from 16Hz to 16kHz

HD 2110L HD 2110L Safety Safety –– Building acoustic Building acoustic –– Environmental Acoustics Environmental Acoustics --Sound insulation Sound insulation –– Machines Machines -- Monitoring Monitoring –– Vehicle Noise Vehicle Noise

– Octave bands from 16Hz to 16kHz– Third octave bands from 16Hz to 20kHz or from 14Hz to

18kHz (shifted band)..FFT analyser

– FFT from 12.5Hz to 22kHz with resolutions 1.5Hz up to 95Hz

Random field corrections and for windshield or all-weather environmental protection.

Measurement range: 20dB – 140dB

Linearity range: 110dBOptions:

– 1/3 octave spectral anlysis (including shifted 1/3oct filters)– Reverberation time measurement– FFT analyser

Dynamic range HD 2110LDynamic range HD 2110L

30-1

40

20-1

30


Noise source Subjective evaluation dB

Jet fighter Takeoff at 30m 140

Gunnery at 3m 130

Clenching machine Deafening (pain) 120

Motorycle accelerating (few meters) 110

Clacson 100

Noisy urban road Very strong 90Noisy urban road Very strong 90

Noisy pub strong 80

Train at 30m 70

Road traffic noise (fluid) moderate 60

Normal conversation 50

TV low volume light 40

Residential area 30

burring of bug at 1m 20

Rustle of a leaf Very light

20µPa

10

Udibility threshold 0

APPLICATIONS

Machine Sound Power measurements:– ISO 3741, 3743, 3744, 3746

Sound insulations

Occupational noise measurement:– D.Lgs. 81/2008 ed UNI 9432

USE LIMITATIONS


Integrating SLM/Analyser HD 2110LIntegrating SLM/Analyser HD 2110L

– D.Lgs. 81/2008 ed UNI 9432– Misura dell’indice di impulsività

Environmental noise measurement – automaticidentification of events

– Noise Mapping, Directive 2002/49/CE– Road traffic noise, railway and airport noise– D.M. 16/03/1998– Community noise

Building acoustics– ISO 140 measurements

Architectural acoustic– UNI 33821 and UNI 3382-2

– Clarity, Definition and Lateral Energycalculation not possible (ISO 3382-1)



SLM/Analyser screens• SLM • FFT• FFT• 1/3octave• 1/3octave +

Eq.Loudness curves

Spectral analysis :– Average spectrum– Multispectrum from 0.5s– Min and Max spectrum

analysis

Profilo Leq Short

40

50

60

70

80

90

100

livel

lo[d

B]

1ms

p[t]



analysis

Measurement of Short-Leq profile in1/32s periods .

Udibility evaluation due to real time superimposition of isophonic (Eq.Loudness) curves over the measured 1/3 octave spectrum (ISO 226:2003).

30

34 35 36 37 38 39 40

tempo [s]

SCHEME

• ½” , 200V polarized, detachable microphone, free field response or random field with electronic correction

• Detachable preamplifier with variable gain and cable driver



• A/D converter with hi-resolution and 48Ksps sampling

• I/O digital audio with S/PDIF interface

• DSP for parallel calculation of acoustic filters and octave band and FFT spectral analysis

• uP (micro) for I/O periferals management (display, ports, memory, kayboard) and data record on internal Flash memory

SLM screen of HD 2110LSLM screen of HD 2110L• 5 descriptors (3 for HD2010UC) without any limit on weightings selections

are displayed in numerical format and updated 2 time per second• Instantaneous parameters are displayed as maximum value every 0.5s• A pseudo-analogic band indicates the istantaneous noise level

Integration time

Measurement time


State indicator

Descriptors

Integration time

Measurement time

Battery autonomy

Weightings

Analog band and measurement range 20

Leq

RUN

indicatore di sovraccaricoin corsomemoria

PAUSERECSTOP

WarmUpWPrintP

HOLDH

M MonitorR Replay

OVERLOAD INDICATOROL REAL TIME

OL MEMORY

PROFILE screen of HD 2110LPROFILE screen of HD 2110L• Displays the first 100 samples of an acoustic descriptor (selectable)• Sampling intervall programmable from 1/8s to 1 hour• Pseudo-analog bar indicates the noise instantaneous level• In black it is displayed the noise event when detected


Descriptor

Overall Level

Measurement time

f. Weighting

Sampling period

Scale dB/div

Scale Min-Max

OCTAVE screen of HD 2110LOCTAVE screen of HD 2110L• Octave and Third octave bands with wide band indicator (Overall)• Average spectrum or multispectrum from 0.5s to 1 hour• Min and Max spectrum identification• Udibility analysis with isophonic curves identification (ISO 226)

Profile N. Spectra


Acquisition mode

Overall level

Measurement time

Auxliary weighting

Time constant

Scale dB/div

Scale reference

time

FFT screen of HD 2110LFFT screen of HD 2110L• FFT spectrum in 3 bands from 12Hz to 22kHz with resolution 1.5 Hz

(12Hz - 300Hz), 12Hz (300Hz - 3kHz) and 100Hz (3kHz – 22kHz)• Multispectrum analysis from 0.5s

FFT band


Ist.Level

Measurement time

Frequency Linear axis

Spectral resolution

Scale dB/div

FFT band

Scale reference

Acquisition mode

STATISTIC screen of HD 2110LSTATISTIC screen of HD 2110L• One descriptor statistic (LFp, Leq o Lpk) in class of 0.5dB • Sampling from 1/8s to 1 hour• Probability distribution and percentile levels graph


Istant.level

Measurement time

Probability axes %

Sampling interval

Scale dB/div

Descriptor

Scale reference

Acquisition mode

IdentificationIdentification ofof tonaltonal componentcomponentaccordingaccording toto DD..MM.. 1616//0303//19981998

• Only time and frequency stationary TonalComponents

• 1/3 octave band spectral analysis form 20 Hzto 20 kHz

Tonal component identification with HD 2110LTonal component identification with HD 2110L

• Minimum spectrum with Fast time constant

• Difference > 5dB beetween the tonal band andadjacent bands

• For Tonal Components placed beetween twocentral 1/3oct standard frequencies, it’spossible to use higher resolution filters oralternative central frequencies.

• Udibility comparing tonal component witheq.loudness curves (ISO 226)

Hidden Tonal Components identification HD 2110L Hidden Tonal Components identification HD 2110L

Identification of hidden tonal Identification of hidden tonal componentscomponents

• 1/3 octave band spectral analysisfrom 14Hz to 18kHz with shiftedbands.

70Hz component with standard 1/3 bands

• Spectral analysis with capture ofthe minimum overall A of Fastspectrum in user defined period from1s to 1 hour.

• Evaluation of udibility of the tonalcomponent using real timesuperimposition of isophonic curves(ISO 226).

70Hz component with shifted bands

Reverberation Time measurementReverberation Time measurementwith SLM/Analysers HD 2010UC/A and HD 2110Lwith SLM/Analysers HD 2010UC/A and HD 2110L

• Guided procedure on the Sound Level Meter display • Interrupted noise method or impulse response method• Impulse response: back integration calculation (Schroeder) with

background noise correction• Reverberation time calculation EDT, T10 , T20 e T30 for each band

Linear correlation coefficient

Descriptors:Max levelBackground levelEDTT60 on 10dBT60 on 20dBT60 on 30dB

• Decay profiles acquired at 1/32s (profiles with Schroeder integration for impulse response) for all octave and third octave bands from 100Hz to 10kHz

• Possibility to check profile directly on the screen and calculate T60on selected user interval


Freq.Band

T60 calculation on user defined interval

beetween cursors

Sampling period

Descriptor

• Reverberation time calculation EDT, T10, T20 and T30 for all frequency bands

• Automatic filtering on linear correlation coefficient (>0.95) and on S/N ratio


Acoustic calibratorAcoustic calibratorHD 2020HD 2020

SoundSound calibratorcalibrator conformingconforming toto typetype 11requirementsrequirements (IEC(IEC 6094260942))

•• ForFor standardstandard ½”½” microphonesmicrophones

•• LevelsLevels 9494 andand 114114 dBdB @@11 kHzkHz

•• CompatibleCompatible withwith everyevery ½”½” standardstandardmicrophonemicrophone:: nono correctioncorrection forfor equivalentequivalentloadload volumevolume

•• NoNo correctioncorrection forfor staticstatic pressurepressure

•• InternalInternal clockclock withwith automaticautomatic checkcheck ofofcertification/calibrationcertification/calibration expiryexpiry datedate

•• VeryVery smallsmall dimensiondimension

Sound level meters DELTAOHM

Environment

Transcript of Sound level meters DELTAOHM