SIST EN ISO 16032:2005

SLOVENSKI STANDARD
SIST EN ISO 16032:2005
01-februar-2005
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Acoustics - Measurement of sound pressure level from service equipment in buildings -
Engineering method (ISO 16032:2004)
Akustik - Messung des Schalldruckpegels von haustechnischen Anlagen in Gebäuden -
Standardverfahren (ISO 16032:2004)
Acoustique - Mesurage du niveau de pression acoustique des équipements techniques
dans les bâtiments - Méthode d'expertise (ISO 16032:2004)
Ta slovenski standard je istoveten z: EN ISO 16032:2004
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
SIST EN ISO 16032:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16032:2005

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SIST EN ISO 16032:2005
EUROPEAN STANDARD
EN ISO 16032
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2004
ICS 17.140.20; 91.140.01

English version
Acoustics - Measurement of sound pressure level from service
equipment in buildings - Engineering method (ISO 16032:2004)
Acoustique - Mesurage du niveau de pression acoustique Akustik - Messung des Schalldruckpegels von
des équipements techniques dans les bâtiments - Méthode haustechnischen Anlagen in Gebäuden -
d'expertise (ISO 16032:2004) Standardverfahren (ISO 16032:2004)
This European Standard was approved by CEN on 16 January 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16032:2004: E
worldwide for CEN national Members.

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SIST EN ISO 16032:2005
EN ISO 16032:2004 (E)
Contents page
Foreword.3
Introduction .4
1 Scope.5
2 Normative references.5
3 Terms and definitions .5
4 Instrumentation.8
5 Test method – General .9
6 Measurement procedure.10
7 Measurement of reverberation time.12
8 Correction for background noise.12
9 Precision.13
10 Test report.13
Annex A (normative) A-weighting and C-weighting correction value.15
Annex B (normative) Operating conditions and operating cycles for measuring the maximum sound
pressure level and the equivalent continuous sound pressure level .16
Bibliography .23
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SIST EN ISO 16032:2005
EN ISO 16032:2004 (E)
Foreword
This document (EN ISO 16032:2004) has been prepared by Technical Committee CEN/TC 126 “Acoustic
properties of building products and of buildings”, the secretariat of which is held by AFNOR, in collaboration with
Technical Committee ISO/TC 43 “Acoustics”.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by March 2005, and conflicting national standards shall be withdrawn at the latest by
March 2005.
This document includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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SIST EN ISO 16032:2005
EN ISO 16032:2004 (E)
Introduction
This document specifies the engineering method for the measurement of sound pressure level from service
equipment in buildings. For use of this document measurements are performed under specified operation
conditions and operating cycles. Such conditions are given in Annex B.
The operating conditions and operating cycles given in Annex B are only used if they are not opposed to national
requirements and regulations.
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SIST EN ISO 16032:2005
EN ISO 16032:2004 (E)
1 Scope
This document specifies methods for measuring the sound pressure level from service equipment in buildings
installed to building structures. This document covers specifically measurements of sanitary installations,
mechanical ventilation, heating and cooling service equipment, lifts, rubbish chutes, boilers, blowers, pumps and
other auxiliary service equipment, and motor driven car park doors, but can also be applied to other equipment
attached to or installed in buildings.
3
The methods are suitable for rooms with volumes of approximately 300 m or less in e.g. dwellings, hotels, schools,
offices and hospitals. The standard is not in general intended for measurements in large auditoria and concert halls.
However, the operating conditions and operating cycles in Annex B can be used in such cases.
The service equipment sound pressure level is determined as the maximum A- weighted and optionally C- weighted
sound pressure level occurring during a specified operation cycle of the service equipment under test, or as the
equivalent continuous sound pressure level determined with a specified integration time. A-weighted and
C- weighted values are calculated from octave-band measurements.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN 60942, Electroacoustics — Sound calibrators (IEC 60942:2003).
EN 61260, Electroacoustics — Octave-band and fractional-octave-band filters (IEC 61260:1995).
EN 61672-1, Electroacoustics - Sound level meters - Part 1: Specifications (IEC 61672-1:2002).
EN 61672-2, Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests (IEC 61672-2:2003).
EN ISO 3382, Acoustics - Measurement of the reverberation time of rooms with reference to other acoustical
parameters (ISO 3382:1997).

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
sound pressure level
L
2
ten times the logarithm to the base 10 of the ratio of the square of the sound pressure, p (t), to the square of the
2
reference sound pressure p , measured with a particular time weighting and a particular frequency weighting,
0
selected from those defined in EN 61672-1. It is expressed in decibels. The reference sound pressure is 20 µPa
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3.2
average sound pressure level
L
n
 
0,1×L
i
 10 
∑
 i=1 
= 10 lg dB (1)
L
 
n
 
 
where
L is the sound pressure level at different microphone positions, in decibels, to be averaged
i
3.3
A- weighted sound pressure level calculated from octave-band values in the frequency range 63 Hz to
8 000 Hz
L
A
n
0,1( + )
Li Ai
= 10 lg  dB (2)
LA 10
∑
i=1
where
L is the sound pressure level in octave-band i, and A is the A-weighting correction for octave-band i
i i
(see Annex A). The value of L depends on the measurements, but can be all the parameters of 3.6
i
3.4
C- weighted sound pressure level calculated from octave-band values in the frequency range 31,5 Hz to
8 000 Hz
L
C
n
0,1( + )
Li Ci
= 10 lg  dB (3)
L 10
C
∑
i=1
where
L is the sound pressure level in octave-band i, and C is the C-weighting correction for octave-band i
i i
(see Annex A). The value of L depends on the measurements, but can be all the parameters of 3.6
i
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3.5
sound exposure level
L
E
the sound exposure level of a sound event is given by the formula:
t
2
2
1 p (t)
= 10 lg  dt dB (4)
L
E
2
∫
t p
o
t
o
1
where
p(t) is the instantaneous sound pressure in Pascals;
t - t is a stated time interval long enough to encompass all significant sound of a stated event, in
2 1
seconds;
p is the reference sound pressure (20 µPa);
o
t is the reference duration (t = 1 s)
o o
3.6
service equipment sound pressure level in octave-bands in the frequency range 31,5 Hz to 8 000 Hz
in the following subclauses 3.6.1 to 3.6.9 are defined the octave-band values which can be measured according to
this document. See also Clause 5, Table 1
3.6.1
L
S max
maximum sound pressure level in octave-bands determined with time weighting “S”
3.6.2
L
S max, nT
maximum sound pressure level in octave-bands determined with time weighting “S” and standardized to a
reverberation time of 0,5 s (3.8, equation (5))
3.6.3
L
S max, n
maximum sound pressure level in octave-bands determined with time weighting “S” and normalized to an
2
equivalent sound absorption area of 10 m (3.8, equation (6))
3.6.4
L
F max
maximum sound pressure level in octave-bands determined with time weighting “F”
3.6.5
L
F max, nT
maximum sound pressure level in octave-bands determined with time weighting “F” and standardized to a
reverberation time of 0,5 s (3.8, equation (5))
3.6.6
L
F max, n
maximum sound pressure level in octave-bands determined with time weighting “F” and normalized to an
2
equivalent sound absorption area of 10 m (3.8, equation (6))
3.6.7
L
eq
equivalent continuous sound pressure level in octave-bands
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3.6.8
L
eq, nT
equivalent continuous sound pressure level in octave-bands standardized to a reverberation time of 0,5 s (3.8,
equation (5))
3.6.9
L
eq, n
equivalent continuous sound pressure level in octave-bands normalized to an equivalent sound absorption area of
2
10 m (3.8, equation (6))
3.7
reverberation time
T
time that would be required for the sound pressure level to decrease by 60 dB after the sound source has stopped.
It is expressed in seconds
3.8
standardized/normalized sound pressure level
the measured sound pressure levels in octave-bands can be standardized to a reverberation time of 0,5 s or
2
normalized to an equivalent sound absorption area of 10 m . The equations (5) and (6), respectively, are used
T
= L - 10 lg dB (5)
L
nT
T
0
where
L can be L , L , L ;
S max F max eq
T is the measured reverberation time in seconds;
T = 0,5 s
0
T
A0
= L - 10 lg (6)
L
n
0,16 V
where
L can be L , L , L ;
S max F max eq
T is the measured reverberation time in seconds;
V is the room volume in cubic metres;
2
A is the reference equivalent sound absorption area in square metres; A = 10 m
0 0
 
s
 
0,16 has the unit .
m
 
 
4 Instrumentation
Measurement of the maximum sound pressure level according to this document implies the use of an octave-band
real-time frequency analyser. The analyser shall be able to read values of all octave-band sound pressure levels at
the time when the maximum A-weighted or C-weighted sound pressure level occurs (during a specified operating
cycle of the service equipment under test).
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NOTE It is important to ensure that the equipment used according to this document fulfils the requirement stated above.
The most common analysers used for building acoustic measurements include this feature.
The instrumentation system, including the microphone and cable, shall meet the requirements for a class 1
instrument specified in EN 61672-1.
For measurements in octave-bands, the filters shall meet the requirements for class 1 filters specified in EN 61260.
At the beginning and at the end of the measurements verify the sensitivity of the instrumentation with a sound
calibrator class 1 according to EN 60942.
5 Test method – General
The service equipment sound pressure level is measured in octave-bands in the frequency range 31,5 Hz/63 Hz to
8 000 Hz as the linear (unweighted) spectrum corresponding to the maximum A-weighted or C-weighted sound
pressure level occurring during a specified operating cycle of the service equipment under test. In order to measure
the service equipment sound pressure level a parallel time dependent recording of the A-weighted or C-weighted
sound pressure level and the sound pressure levels in octave-bands shall be made (multispectral recording). For
evaluation of the equipment sound pressure level take the octave band spectrum at that time when the maximum
A-weighted or C-weighted sound pressure level occurs. Time weighting “S” or “F” shall be used. Alternatively or
additionally the equivalent continuous sound pressure level can be determined with a specified integration time.
The octave-band results are corrected for background noise and - if required - standardized to a reverberation time
2
of 0,5 s or normalized to an equivalent sound absorption area of 10 m . Finally the A-weighted and C-weighted
sound pressure levels are calculated from the corrected octave-band results.
A-weighted and C-weighted values shall always be calculated from octave-band results, also in situations where
standardization or normalization is not carried out.
The single number quantities which can be determined according to this document are given in Table 1 (calculated
from the octave-band values defined in 3.6.1 to 3.6.9). The notation in the table shall be used when reporting
measurement results. The different quantities can be combined according to e.g. requirements in national building
code regulations.
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Table 1 — Single number quantities
A-weighted value C-weighted value
(calculated from (calculated from
octave-band values octave-band values
in the frequency in the frequency
range 63 Hz to range 31,5 Hz to
8 000 Hz) 8 000 Hz)
L L
Maximum sound pressure level, time
AS max CS max
a
L
weighting “S”
L
AS max, nT
CS max, nT
a
L
L
AS max, n
CS max, n
Maximum sound pressure level, time L L
AF max CF max
a
weighting “F” L
L
AF max, nT
CF max, nT
a
L
L
AF max, n
CF max, n
L L
Equivalent continuous sound pressure
Aeq ceq
a
L
level
L
Aeq, nT
Ceq, nT
a
L
L
Aeq, n
Ceq, n
a
See 6.7.
The different single number quantities given in Table 1 are not comparable. Only measurement results obtained
with the same method shall be compared. When measurement results are compared with legal requirements it
shall be ensured that both refer to the same quantity.
If the sound contains clearly audible tonal components, this shall be stated in the report.
Windows and doors shall be closed during the measurements. The person performing the test should stay outside
the room.
6 Measurement procedure
6.1 General
The service equipment sound pressure level is to be determined for a specified operating condition and operating
cycle. Operating conditions and operating cycles are given in Annex B. They shall only be used if they are not
opposed to national requirements and regulations.
According to this document the sound pressure level is measured in three microphone positions, one position in a
corner of the room and two positions in the reverberant sound field.
The service equipment sound pressure level is measured using the following procedure (step 6.2 to 6.9):
6.2 Selection of the corner position for the microphone
To select the corner position (position no. 1), search for the corner of the room with the highest C-weighted sound
pressure level. The measurement shall be carried out as the maximum sound pressure level with time weighting “S”
or “F”, or as the equivalent continuous sound pressure level. The quantity used for selection of the corner position
shall be the same as the one chosen to be the final result, but without any corrections. Use the chosen operating
condition and operating cycle.
The microphone position shall, preferably, at each corner be 0,5 m from the walls and 0,5 m above the floor. If in a
corner this is not feasible due to protruding furniture, obstacles etc., increase the height to 1,0 m or if necessary to
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1,5 m above the floor. The measurement height shall be the same for all the corners. Move away small protruding
items that do not affect the sound field, if necessary. The microphone position shall be at least 0,2 m away from
any obstacle. If the sound pressure level in a corner is dominated by direct sound from a source in the room - e.g. a
ventilation outlet - this corner shall be left out when choosing the corner position.
For selection of the corner position, the C-weighted equivalent continuous sound pressure level can be measured
directly e.g. by use of a hand held integrating sound level meter. Calculation from octave-bands is not required. The
selection procedure for the corner position stated above shall be used prior to all measurements according to this
document.
6.3 Selection of the reverberant field positions of the microphone
Choose two additional positions (nos. 2 and 3) in the reverberant field of the room. Whenever practicable, the
minimum distance between each of the positions 1 (the corner position), 2 and 3 shall be at least 1,5 m. The
distance to any sound source in the room shall be at least 1,5 m. The distance between positions 2 and 3 and any
room surface shall be at least 0,75 m. In small rooms where this requirement cannot be fulfilled, the distance can
be decreased to 0,5 m. The height above floor level shall be at least 0,5 m and not more than 1,5 m.
6.4 Determination of the number of measurements at each microphone position
6.4.1 For measurement of the equivalent continuous sound pressure level
In the corner position, make two consecutive measurements of the A-weighted equivalent continuous sound
pressure level L . For this purpose the chosen operating conditions and operating cycles shall be used (as for
Aeq
choosing the corner position in 6.2, a hand held integrating sound level meter can be used). If the difference
between the results of the two consecutive measurements is equal to or less than 1,0 dB, then one measurement
in each of the microphone positions 1, 2 and 3 is sufficient. If the difference exceeds 1,0 dB, the number of
measurements at each microphone position shall be equal to the difference in level (rounded up to nearest whole
value; a difference of e.g. 3 dB results in three measurements in each position).
6.4.2 For measurement of the maximum sound pressure level
If the maximum sound pressure levels are to be measured, use the A-weighted maximum sound pressure level with
a similar procedure to 6.4.1 to determine the number of measurements to be made at each position. The chosen
operating conditions and operating cycles shall be used. However, especially for sound events of short duration, it
is allowed to use the sound exposure level L instead of the maximum sound pressure level when determining the
AE
required number of measurements at each microphone position.
6.5 Averaging the sound pressure level
Use the relevant operating conditions and operating cycles as stated in Annex B. Measure the linear (unweighted)
octave-band levels at each of the three microphone positions the number of times determined according to 6.4.
Calculate for each octave-band the average level of all the measurements (see 3.2). The octave-band levels shall
be rounded to one decimal place.
6.6 Correction for background noise
Determine the octave-band background noise level and correct the measured service equipment sound pressure
level according to Clause 8.
6.7 Standardization or normalization of octave band results
If required, the octave-band results corrected for background noise can be standardized or normalized to reference
absorption properties of the room. Measure the reverberation time according to Clause 7, and make the
standardization by use of equation 5 in definition 3.8, and the normalization according to equation 6 in definition 3.8.
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Because of severe problems by determining the reverberation time for the 31,5 Hz octave-band, the measured
sound pressure level in this band shall not be standardized or normalized. If the 31,5 Hz octave-band contributes to
the C-weighted sound pressure level, this shall be mentioned in the report.
Background noise problems may be present when measuring the reverberation time in the 8 000 Hz octave-band.
If this problem occurs it is allowed not to correct the 8 000 Hz octave-band sound pressure level of the service
equipment, if this level is at least 15 dB below the octave-band in the spectrum with the highest level.
6.8 Calculation of A- and C-weighted values
Using either the results achieved in 6.6, or alternatively 6.7, determine the A-weighted level from the octave-band
levels in the frequency range 63 Hz to 8 000 Hz according to definition 3.3. Determine the C-weighted level from
the octave-band levels in the frequency range 31,5 Hz to 8 000 Hz according to definition 3.4. The A-weighted and
C-weighted results shall be rounded to an integer.
6.9 Sound sources present in the room (additional measurements)
In situations where sound sources are present in the room - e.g. a ventilation outlet in the wall or in the ceiling - an
additional measurement position shall be used for each source. For noise sources in the wall a position is chosen
1 m in front of the source and 1,5 m above floor level. For a noise source in the ceiling, the position shall be 1,5 m
above floor level, directly below the source. Additional measurement result(s) shall not be standardized or
normalized. They shall be reported separately and shall not be included in the average of the microphone positions
1, 2 and 3.
7 Measurement of reverberation time
The reverberation time is measured in octave-bands in the frequency range 63 Hz to 8 000 Hz according to EN ISO
3382.
8 Correction for background noise
The background noise measurement shall be made just before or after the service equipment sound pressure level
measurement.
The background noise shall be determined in octave-bands as the equivalent continuous sound pressure level over
a period of approximately 30 s. The same microphone positions as used for the service equipment sound pressure
level measurements shall be used. Calculate the energetic average of the background sound pressure level in the
three positions before correction of the service equipment sound pressure level. This method is only suitable
provided that the background noise is approximately constant in time.
If the background noise level is 10 dB or more below the sound pressure level of the service equipment, no
correction shall be made.
If the background noise level is 4 dB to 10 dB below the sound pressure level of the service equipment, the
measured sound pressure level shall be corrected using the following equations (7) to (9):
L = L – K dB (7)
1

-0,1× ∆L
( )
K = -10 lg 1-10 dB  (8)

∆L = L - L dB (9)
1 2
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where
L is the corrected sound pressure level, in decibels;
L is the measured octave-band sound pressure level from the service equipment including background
1
noise, in decibels;
L is the octave-band background sound pressure level, in decibels;
2
K is the octave-band correction value, in decibels.
A difference of 4 dB corresponds to a correction value of 2,2 dB. If the difference is less than 4 dB the correction
value shall be limited to 2,2 dB, and in the report it shall be stated that the measurement result is influenced by
background noise. For comparison with noise limits, the measuring result can be considered as the upper limit of
the service equipment sound pressure level. It shall be stated whether or not the background noise is influencing
the A-weighted and C-weighted service equipment sound pressure level.
NOTE If the background noise is varying with time - e.g. caused by road traffic - a reliable correction cannot be made.
However, the maximum sound pressure levels of the background noise could be determined over a period of 10 min to 15 min
in one of the microphone positions. If the maximum level is 10 dB or more below the service equipment sound pressure level the
result can be regarded valid without correction. It could also be helpful to monitor the time signal to select the appropriate time
slot for measurements and check the validity in all relevant octave-bands.
9 Precision
In Table 2 are given estimates of the standard deviation associated with reproducibility. The values are estimated
based on a limited number of measurements on sound sources constant in time [1]. Fluctuations of the sound
pressure level of the source will increase the measurement uncertainty, particularly for maximum sound pressure
levels.
Table 2 — Estimated standard deviation associated with reproducibility
Octave-band centre frequencies Standard deviation of reproducibility
Hz dB
31,5 1,5
63 1,5
125 1,5
250 1,5
500 1,2
1 000 to 8 000 1,0
a
A-weighted
0,8
a
C-weighted
1,1
a
Valid for a constant sound with a relatively flat sound spectrum in the frequency range 100 Hz to
8 000 Hz and with a difference between service equipment sound pressure level and background noise

level of at least 10 dB.
Fluctuations of the sound pressure level of the source will increase the measurement uncertainty, particularly for
maximum sound pressure levels.
10 Test report
The test report shall include the following information:
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a) the name and address of the test laboratory;
b) the name and address of the organization or the person who ordered the test;
c) the date of the test;
d) a reference to this document;
e) an identification of the room where the service equipment sound pressure level has been measured;
f) a description of relevant building constructions;
g) an exact description of the equipment tested;
h) detailed information about operating conditions and operating cycles (e.g. period of a cycle) if they deviate
from Annex B;
i) for water installations:
1) normative:
 the position of stop cocks;
 a description of all relevant aspects of the water installation and the operating conditions;
2) optional:
 the flow pressure (cold and warm water system);
 the flow rate/refilling time for cisterns;
 the manufacture and destination of the valve or device;
 the sound class and flow rate for valves or devices classified acco
...