Government Decree No. 502 / 2000 Coll.
Government regulation on health protection against adverse effects of noise and vibration
Valid
Regulation
Effective from 01.01.2001
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502
GOVERNMENT REGULATION
of 27 November 2000
on the protection of health from adverse effects of noise and vibration
The Government mandates pursuant to § 108 (3) of Act No. 258 / 2000 Coll., on the Protection of Public Health and on the amendment of certain related laws, to implement § 30, 32 and § 34 (1) and § 134c (7) of Act No. 65 / 1965 Coll., Labour Code, as amended by Act No. 155 / 2000 Coll.:
Basic provisions
(1) This Regulation establishes maximum permissible noise and vibration values for the workplace, for the protected outdoor area, for the protected indoor spaces of buildings and for the protected outdoor spaces of buildings and for the measurement and evaluation of these values. The emission values of noise are laid down in specific legislation.1) The concepts and definitions and labelling of the quantities are set out in Annex 1 to this Regulation.
(2) This Regulation shall not apply to:
(a) noise from the normal use of the apartment;
(b) voice manifestations of humans and animals,
(c) musical manifestations and noise from the activities of persons in public spaces, except in the case of noise caused by production or other business activities of persons;
(d) noise and vibration within the means of transport, with the exception of their operation,
(e) isolated noise events which, by their low frequency or short-term exposure, cannot directly endanger public health;
(f) noise and vibration caused by the execution of rescue and disposal operations.
Basic concept
For the purposes of this Regulation, the maximum permissible value of noise or vibration shall be the hygiene limit established for the places of residence of persons with regard to the protection of their health from the adverse effects of noise or vibration.
Noise in workplaces
Constant and variable noise
(1) The steady and variable noise values at the workplace are expressed by equivalent sound pressure levels A LAeq, T. For the purpose of the evaluation, the standard noise exposure level for the normal duration of the working day 8 h LEX, the 8 h exchange noise exposure level, or the noise exposure level normalised to the rated eight-hour day for the weekly exposure of LEX, w. The noise load shall be expressed by exposure to A EAT noise.
(2) Maximum equivalent sound level permitted And for the eight-hour working hours LAeq.8h, which is the maximum permitted standard noise exposure level for the normal duration of the 8 h LEX working day, 8h working day, or the maximum permitted noise exposure level standardised on the rated 8-hour working day for the weekly exposure of LEX, w shall be determined by the sum of the basic sound pressure level A 85 dB and the corrections taking into account the type of activity carried out in accordance with Annex 2 to this Regulation. The maximum permissible replacement noise exposure A EA, 8h at the workplace for the type of activity in Group VI as set out in Annex 2 to this Regulation shall be 3 640 Pa2s.
(3) The assessment of the average weekly noise exposure normalised on a nominal eight-hour working day may only be used in workplaces where the working time is not evenly distributed during the working week or where the noise at work changes significantly during the week, but the individual weekly noise exposure does not differ significantly.
Noise with distinctive tone components
(1) Noise with significant tone components at the workplace is expressed and evaluated as steady and variable noise.
(2) However, the maximum permissible sound pressure levels shall be reduced by 5 dB if the noise is of a tone character which is demonstrated by frequency analysis in third octave bands. If the tone character of the noise can be demonstrated by narrowband analysis in frequency bands with a relative width of 6 per cent or subjectively, the maximum permissible values shall be reduced by 2 dB.
Impulse noise
(1) The values of the impulse noise at the workplace are expressed by the peak sound pressure values C, the peak sound pressure levels C and equivalent sound pressure levels A with the time characteristics I LAIeq, T.
(2) The maximum permissible peak value of sound pressure C is 200 Pa, the maximum permissible peak level C is 140 dB.
(3) Maximum equivalent sound level permitted And with time characteristics I standard for eight-hour working hours LAIeq, 8h shall be determined by the sum of the basic sound pressure level A 85 dB and the corrections taken into account in the type of activity carried out pursuant to Annex 2 to this Regulation. The maximum permissible exchange exposure to sound A EAI, 8h at the workplace for group VI activities as set out in Annex 2 to this Regulation shall be 3 640 Pa2s.
(4) If the noise at the workplace is not composed solely of impulse noise but consists of a combination of impulse and steady or variable noise, it is expressed as variable noise. The noise load is also expressed. If in this case a significant proportion of the impulse noise component is demonstrated to be equivalent to the sound pressure level A LAeq, T (i.e. LAIeq, T - LAeq, T > 5,0 dB), the maximum equivalent sound pressure level shall be reduced A determined in accordance with § 3 by 5 dB.
High frequency noise
(1) High frequency noise at the workplace is expressed by equivalent sound pressure levels Lteq, T in third octave bands with a mean frequency of 8 to 16 kHz.
(2) The maximum permissible equivalent sound pressure level of the high-frequency noise in the third octave bands 8, 10, 12,5 and 16 kHz for the eight-hour working hours for this noise shall be determined by the sum of the basic sound pressure level in the third octave band Lteq, 8h = 70 dB and by corrections taking into account the type of activity carried out in accordance with Annex 2 to this Regulation.
(3) In noise-sensitive workplaces in the 16 to 20 kHz band, high-frequency noise is evaluated on the basis of equivalent Lueq, T sound pressure levels in frequency bands of 6% width (one 12 octave). The maximum permissible equivalent sound pressure levels for an eight-hour working time for this frequency area shall be determined by the sum of the basic sound pressure values set out in Annex 3 to this Regulation and the corrections taking into account the type of activity carried out as set out in Annex 2 to this Regulation.
Ultrasound
(1) Ultrasound is expressed at the workplace by equivalent sound pressure levels Lteq, T in third octave bands with a mean frequency of 20 to 40 kHz.
(2) The maximum equivalent sound pressure level permitted for eight-hour working hours in the third octave bands 20, 25, 31,5 and 40 kHz is determined by the sum of the basic sound pressure level of the third octave bands Lteq, 8h = 105 dB and the corrections taking into account the type of activity carried out pursuant to Annex 2 to this Regulation.
Infrastics and low frequency noise
(1) The values of infrasound at the workplace are expressed by equivalent sound pressure levels G of LGeq, T, or if the frequency composition of the infrasound is to be determined by the Lteq sound pressure levels in the 1 to 16 Hz third octave bands. The low-frequency noise values shall be expressed by equivalent Lteq, T sound pressure levels in third octave bands 20 to 40 Hz.
(2) The maximum permissible equivalent sound level G of infrasound and low-frequency noise for eight-hour working hours shall be determined by the sum of the baseline LGeq level, 8h = 116 dB and the corrections taking into account the type of activity carried out in accordance with Annex 4 to this Regulation.
(3) The maximum permissible equivalent sound pressure levels of the infrasound for an eight-hour working time in the third octave bands 1 to 16 Hz shall be determined by the sum of the baseline Lteq, 8h = 110 dB and the corrections taking account of the type of activity carried out in accordance with Annex 4 to this Regulation.
(4) The maximum permissible equivalent low-frequency noise sound level for eight-hour working hours in the 20 to 40 Hz octave bands shall be determined by the sum of the baseline Lteq, 8h = 105 dB and the corrections taking account of the type of activity carried out in accordance with Annex 4 to this Regulation.
(5) For short-term exposure, the maximum sound pressure levels of infrasound in the 1 to 16 Hz octave bands at the workplace shall not exceed Lptmax = 137 dB. In the 20 to 40 Hz octave bands, the Lptmax value shall not be exceeded = 132 dB.
Maximum permitted exchange exposure values for noise for a non-eight-hour daily noise exposure period T in minutes shall be determined by:
(a) the maximum permitted levels for eight-hour working hours at LAeq noise, 8h shall be added to the KT correction to be determined according to the relation
KT = 10 log (480 / T), / dB /,
(b) the fixed maximum permissible value for the eight-hour working hours in the ESA noise, 8h shall be multiplied by the kT factor determined according to the relation
kT = 480 / T /, / - /.
Personal noise protection
(1) Where there is a risk that the daily personal exposure to noise 85 dB is exceeded, it must be provided to workers with personal noise protection.
(2) In the case where the daily personal exposure to noise exceeds 90 dB or where the peak sound pressure C is greater than 200 Pa, workers shall use personal noise protection, effective in the area of noise levels occurring at work.
Noise in protected outdoor space, in protected indoor areas of buildings and in protected outdoor areas of buildings
Maximum permissible noise levels in protected indoor spaces of buildings
(1) The noise values are equivalent to the sound pressure level A LAeq, T and the maximum sound pressure level A LpAmax. During the day it is set for eight continuous and consecutive loudest hours, at night for the loudest hour. For noise from transport on public roads and railways and for noise from air traffic, it is set for the whole day and night dobu.2)
(2) Maximum equivalent sound level permitted A shall be determined for ambient air noise by the sum of the baseline LAeq, T = 40 dB sound pressure level and the corrections taking into account the use of the spaces and the time of day referred to in Annex 5 to this Regulation. If the noise contains a significant tone component or if it has a distinct information character, such as electroacoustic amplified speech, further correction -5 dB is added.
(3) Maximum permissible sound level A shall be determined for noise from sources within the building by the sum of the basic maximum noise level LpAmax = 40 dB and the corrections taking into account the use of space and the time of day referred to in Annex 5 to this Regulation. If the noise contains a significant tone component or has a significantly informative character such as electroacoustic amplified speech, further correction -5 dB is added. Noise from sources inside the building is also considered to be noise from sources located outside the subject under consideration, penetrating these objects in a way other than air, that is, structures or subsoil.
(4) When building modifications are made on the basis of a building permit or a declaration within the building, a correction of + 15 dB to the maximum permissible sound pressure level A determined in accordance with paragraph 2 shall be permitted on working days from 7 to 21 hours. The maximum permissible value of noise from the construction activity shall be calculated for a period of less than 14 hours as set out in Annex 5 to this Regulation. The first and second sentences shall not apply to health and social care establishments where works are carried out in the operation of such establishments.
(5) The median time of reversing in school non-musical classrooms and common rooms for preschool children must not exceed 1,0 s, in sports halls, gyms and corridors of school and medical buildings 2.0 s. For new structures, superstructures and harbours, the values of the optimum reverberation time according to the relevant technical standard.3)
(6) Maximum permissible value of equivalent sound level And for the sound of electronically amplified music, it is set for music production during social entertainment at the value of LAeq, T = 95 dB and for concert production at the value of LAeq, T = 100 dB for space inside the auditorium, for time T = 4 hours maximum. Compliance with the limits referred to in paragraph 6 in the internal area of entertainment undertakings shall not automatically entail compliance with the hygiene limits in the surrounding protected areas and in the protected outdoor area.
Maximum permissible noise levels in protected outdoor space and in protected outdoor areas of buildings
(1) Noise values are expressed in equivalent sound pressure level A LAeq, T. During the day, it shall be fixed for the eight continuous and consecutive loudest hours, at night for the loudest hour, for traffic noise on public roads and for air traffic noise shall be fixed for the whole day and night hours. High energy impulse noise is expressed by the sound exposure level C LCE of individual impulses.
(2) The maximum permissible equivalent sound pressure level A (excluding air traffic noise and high energy impulse noise) is determined by the sum of the basic noise level LAeq, T = 50 dB and the corresponding correction for the daytime or night time and place referred to in Annex 6 to this Regulation. For high impulse noise, add additional correction -12 dB. If the noise contains a significant tone component or if it has a distinct information character, such as electroacoustic amplified speech, further correction -5 dB is added.
(3) The maximum permissible LCRE sound exposure level for individual high energy noise impulses is 128 dB. The sound exposure level LCRE shall be calculated for each high energy noise pulse as set out in Annex 6 to this Regulation.
(4) Maximum equivalent sound level permitted A from air traffic shall be determined by the sum of the basic noise levels LAeq, T = 65 dB and the corresponding correction for the daytime and night hours and place referred to in Annex 7 to this Regulation.
(5) The correction + 10 dB to the maximum permissible equivalent sound pressure level A determined in accordance with paragraph 2 shall be permitted for the implementation of new structures and changes to completed structures between 7 and 21 hours. The maximum permissible value of noise from the construction activity shall be calculated for a period of less than 14 hours as set out in Annex 6 to this Regulation.
(6) If it is technically demonstrated that, in the existing installation after all the means of its noise protection have been exhausted, it is technically not possible to comply with the provisions of paragraphs 1 to 4, it is necessary to ensure that the necessary protection of the indoor space of buildings from noise is ensured in such a way as to comply with the conditions laid down in Section 11. The possibility of ventilation must be maintained.
Vibrations
Maximum permitted vibration values
(1) Human vibrations in workplaces, in buildings with residential and residential rooms and in total vertical vibrations with a frequency below 0,5 Hz are expressed
(a) the average weighted level of vibration acceleration Law in dB or the weighted effective value of vibration acceleration aew in m.s-2;
(b) average vibration acceleration levels in the third octave Lat frequency bands in dB or effective vibration acceleration values in the third octave frequency bands in m.s-2;
(c) the average aggregate weighted level of acceleration of vibration by Lvw in dB or the aggregate weighted effective value of acceleration by avw in m.s-2 in the case of segmental vibration transmitted on hand.
(2) In the case of total vibrations, vibrations in structures, vibrations transmitted in a special way and vertical vibrations with a frequency of less than 0,5 Hz, the maximum permissible values apply to only one direction of translational vibrations according to the human coordinate system. For hand-transmitted vibration, the maximum permitted vibration values refer to the aggregate translational vibration value determined from the weighted acceleration values in three orthogonal directions according to the hand coordinate system.
(3) The frequency band in which vibration needs to be assessed with regard to their possible adverse effects on humans (hereinafter referred to as the "frequency band") and for which maximum permitted vibration values are established is listed in Annex 8 to this Regulation, depending on the mode or conditions of transmission.
(4) The specified maximum permissible values apply to both fixed and variable vibrations and shocks (shocks) when the main part of their energy is contained in the monitored frequency band.
(5) The vibration acceleration levels and effective vibration acceleration values are interchangeable vibration values.
(6) The vibration limits apply to vibration transmitted from the environment to humans. Depending on the mode of transmission and ambient conditions, maximum permitted values for total vertical and horizontal vibrations, maximum permitted values for hand-transmitted vibrations, maximum permitted values for vibrations transmitted in a special way, maximum permitted values for vibrations in housing and civil equipment structures and maximum permitted values for total vertical vibrations of less than 0,5 Hz are determined.
Maximum permissible values for total vertical and horizontal vibrations
(1) The maximum permitted acceleration levels of the total vertical vibrations in the third octave bands of the Latp applicable for the eight-hour working time and the maximum permitted effective acceleration values of the total vertical vibrations in the third-octave bands of the aetc valid for the eight-hour working time are set out in Annex 9 to this Regulation.
(2) The maximum permissible weighted acceleration of the total vertical vibration of the Lawp applicable for eight-hour working hours shall be 110 dB. Maximum weighted effective value of vertical vibration acceleration aetp valid for eight-hour working hours is 0,315 m.s-2.
(3) The maximum permitted acceleration levels of the total horizontal vibrations in the third octave bands of the Latp applicable for the eight-hour working time and the highest effective acceleration values of the total horizontal vibrations in the third octave bands of the aetp valid for the eight-hour working time are set out in Annex 9 to this Regulation.
(4) The maximum permissible weighted acceleration of the total horizontal vibration of the Lawp applicable for eight-hour working hours is 107 dB. Maximum weighted effective value of the acceleration of total horizontal vibrations aetp valid for eight-hour working hours is 0,22 m.s-2.
Maximum permitted vibration values transmitted on the hand
(1) The maximum permissible aggregate acceleration levels of the vibration transmitted to the hands for the Latp third octave band, or, where appropriate, the maximum aggregate effective acceleration aetp for the eight-hour working hours are set out in Annex 9 to this Regulation.
(2) The maximum permissible aggregate weighted level of vibration acceleration transmitted to the hand of Lavwp valid for eight-hour working hours is 123 dB. The maximum permissible aggregate weighted value of the acceleration of vibration transmitted to the hands avwp valid for eight-hour working hours is 1,4 m.s-2.
Maximum permissible vibration values transmitted in a special way
The maximum allowable vibration acceleration level transmitted in a special way by the Latp for all third octave bands of the monitored frequency area and for eight-hour working hours is 100 dB.
Maximum permissible vibration values at workplaces for other than eight-hour working hours
(1) The maximum permitted vibration acceleration values for other working hours of the day T shall be determined by adding the KT correction determined according to the relationship to the specified maximum permissible values for the eight-hour working hours La, 8hp
KT = 10 log (480 / T), / dB /,
where
T is working hours in vibrations in minutes per shift.
(2) The measurement results, i.e. the average vibration acceleration values, shall also be evaluated for T.
(3) Correction of KT for an exposure period other than an eight-hour period is not used for the assessment of local vibration transmitted in a special way.
(4) The KT correction for exposure time to total vibrations of less than 10 minutes per shift is the same as the correction for exposure time T = 10 minutes.
(5) The KT correction for the period of exposure to vibration transmitted to the hand less than 20 minutes per shift is the same as the correction for the time of exposure T = 20 minutes.
Determination of average vibration exposure over multiple working days
(1) If averaging multiple-working-day vibration exposures is required and, for example, exposure to vibration normalised to the nominal working week of 40 h is considered, the average Law level may be determined over the entire period of time from the Law for each day according to the relation:
Law = 10 log 15, Ii = 1n100,1Lawi, dB
n... the number of working days during the working week.
The average effective value of multiple-day vibration acceleration shall be determined by the same procedure.
aew = 15 dost r = 1naewi2, m.s-2
(2) The assessment of the average weekly vibration exposure normalised on the nominal eight-hour working day may only be used in workplaces where working time is not evenly distributed or where vibrations at the workplace vary significantly during the week, but the individual weekly vibration exposure does not differ significantly.
Vibrations in protected indoor spaces of buildings
Maximum permitted vibration values in protected indoor space of buildings
(1) The maximum permitted vibration values in protected indoor areas shall apply to horizontal and vertical vibration at the place of residence of persons.
(2) The maximum permitted vibration acceleration levels in protected indoor areas in the Latp third octave bands shall be the sum of the basic vibration acceleration values set out in Annex 10 to this Regulation and the room usage corrections, daily time and nature of vibration referred to in Annex 11 to this Regulation. The maximum permissible effective vibration acceleration values in the third octave bands aetp are determined by the product of the basic effective vibration acceleration values set out in Annex 10 to this Regulation and the corrections set out in Annex 11 to this Regulation.
(3) The maximum weighted level of vibration acceleration of Lawp construction structures in protected indoor areas is given in Tables 1 and 2 of Annex 12 to this Regulation depending on the type of space, time of day and nature of vibration.
(4) The maximum permissible weighted effective values of aewp vibration acceleration in protected indoor areas are given in Tables 1 and 2 of Annex 12 to this Regulation, depending on the type of space, time of day and nature of vibration.
Vertical vibration limits of less than 0,5 Hz
(1) The maximum permissible vibration values of frequencies below 0,5 Hz relate to the places of residence of persons, in particular to working places on self-driving machines. The maximum permissible values given shall be complied with in terms of limiting kinetosis formation. These values do not concern the assessment of vehicles in terms of comfort.
(2) The maximum permissible acceleration levels of the Latp vibration and the maximum permissible effective aETP for vibrations of less than 0,5 Hz shall be determined in accordance with Annex 13 to this Regulation.
(3) The maximum permissible weighted levels and the vibration acceleration values of less than 0,5 Hz are set out in Annex 14 to this Regulation.
Method of measurement and assessment of noise and vibration
The measurement and assessment of noise and vibrations shall be carried out according to standard methods which mean the methods contained in the Czech technical standard, the result of which is considered to be proven in terms of catch, accuracy and reproducibility of results. When using a non-standard method, it shall be demonstrated that results are comparable to those of the standard method in terms of capture, accuracy and reproducibility. When measuring noise and vibration, the measurement uncertainty to be applied in the assessment of the measured values shall be reported.
Efficacy
This Regulation shall enter into force on 1 January 2001.
Prime Minister:
Ing. Zeman v. r.
Minister for Health:
Prof. MUDr. Fisher, CSc.
Příloha č. 1
Annex No. 1 to Government Decree No. 502 / 2000 Coll.
Explanation of terms, definition of quantities
1. The audible sound is a gradual longitudinal wave in a flexible environment, the frequency of which is between 16 Hz and 20 kHz.
2. High frequency sound is audible sound with distinct frequency components in the frequency band above 8 kHz.
3. Ultrasound is a gradual longitudinal wave in a flexible environment whose frequency is above the audible frequency band.
4. Low frequency sound is audible sound with significant frequency components in the frequency band of less than 100 Hz, in workplaces less than 50 Hz.
5. Infrasvuk is a gradual longitudinal wave in a flexible environment whose frequency is below the audible frequency band.
6. Noise with significant tone components is noise in which a third octave frequency spectrum exceeds the sound pressure level of the adjacent third octave bands by more than 5 dB. Music and singing are also considered a tone sound.
7. Constant noise is noise whose sound pressure level does not change by more than 5 dB at a given location depending on time.
8. The variable noise is a noise whose sound pressure level changes at a given location by more than 5 dB depending on time.
9. The impulse is a one-time sound action, less than 0,2 s, exceeding by at least 10 dB the background noise.
10. Impulse noise is a noise consisting of one pulse or sequence of impulses; when the duration of each pulse is less than 0,2 seconds and the impulses follow each other at intervals exceeding 0,01 seconds.
11. The high impulse noise is composed of impulses in the outdoor area, the source of which is the shooting of small arms, metal forging, beating, nail shooting, buchars, impact of the pilot, eccentric presses, pneumatic hammers and jackers, impact on the moving of wagons or similar sources.
12. High-energy impulse noise is composed of impulses in the open air, the source of which is explosions in quarries and mines, sonic bursts, demolition and industrial processes with the help of explosives, heavy weapons fire, explosive tests and other sources of explosions whose equivalent mass of TNT exceeds 25 g and similar sources.
13. The sound pressure level Lp is expressed in dB and is determined by the relationship
Lp = 20 log (p / po) dB
where
p is the instantaneous sound pressure in Pa,
After the reference sound pressure in Pa,
po = 2.10-5 Pa.
14. The sound pressure level in the third octave band Lpt is the sound pressure level specified in the frequency band of one third of the octave.
15. The peak sound pressure level Lp peak is the highest instantaneous sound pressure level in a given time interval.
16. Maximum sound pressure level Lp max is the highest sound pressure level
17. Equivalent sound pressure level Leq, T is determined by the relationship
Leq, T = 10 log1 / T-0Tp (t) po2dt dB,
where appropriate
Leq, T = 10 log 1 / T-0T100,1 L (t) dt dB,
where
p (t) is the instantaneous sound pressure in Pa,
L (t) is the instantaneous sound pressure level in dB,
T is the time to which the equivalent level refers.
EXPLANATORY
(a) Time The T used for direct measurement or for calculation of Leq, T is selected to give results that are representative of the entire working time or noise period.
(b) For steady-state noise the level of which does not change, L eq, T is numerically identical to the sound pressure level L p.
18. The sound exposure ET is determined by the relationship
ET = kg0Tp2 (t) dt Pa2.s
where
T is the period covered by the exposure to sound in s,
p (t) is the instantaneous sound pressure in Pa.
19. The sound exposure level of L ET is determined by the relationship
L ET = 10.log (ET / E0) dB
where
E 0 is the reference exposure of sound in Pa2. s
E0 = 4.10-10 P2 s
where appropriate
LET = Leq, T + 10.log (T / T0) dB
where
T is the time v s to which the equivalent level refers
T 0 is the reference time interval of 1 s
20. The frequency weighting of the A and C filters according to IEC 651 and G according to ČSN ISO 7196 is used for the expression of health effects. The weighing used must be used in the variable designation, e.g.:
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Regulation Information
| Citation | Government Decree No. 502 / 2000 Coll., on the protection of health against adverse effects of noise and vibration |
|---|---|
| Regulation Type | Regulation |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 30.12.2000 |
|---|---|
| Effective from | 01.01.2001 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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