Acoustic Evaluation of Buildings

ACOUSTIC EVALUATION

The acoustic evaluation consists of the Acoustic Responsibility Term and Report of Acoustic Measurements, and must be accompanied by the declaration of qualification issued by the respective professional order.

Acoustic Responsibility Term

In order to achieve this acoustic performance in buildings, it was required under Ordinance No. 113/2015, of 22 April o The term of acoustic responsibility, which must instruct the processes submitted under the Legal Framework for Urbanization and Edification.

In the case of specific elements of prior information or licensing, the term of responsibility attests that the execution of the subdivision operation or the execution of the urbanization works complies with the General Noise Regulation.

In the case of specific elements of requests for authorization and alteration of use, the term of responsibility certifies the conformity of the work with the acoustic project. In this case, the term of responsibility is drawn up and signed based on acoustic tests, carried out in accordance with the Regulations on the Acoustic Requirements of Buildings.

REPORT ON ACOUSTIC MEASUREMENTS

Verification through acoustic tests in situ (on site), of the conformity of the building’s sound insulation indexes, with the established in Decree-Law nº 96/2008 currently in force (General Regulation of Building Acoustic Requirements) and Sampling LNEC

The main tests are: insulation to aerial sounds between compartments (DnT, w), insulation to percussion sounds of pavements (LnT, w), insulation to aerial sounds of facades (D2m, nT, w), sound pressure levels of equipment buildings (LAr, nT); and reverberation time (T).

Based on the results of the tests, an acoustic test report (acoustic certificate) is prepared, in which the conformity of the values obtained with the legislated acoustic requirements is concluded.

The acoustic evaluation, in addition to being mandatory for requests for authorization and alteration of use, values the property with its information because the problems of acoustic insulation are rarely in sight.

You can also request our Building Acoustic Assessment services within the scope of complaints arising from noise disturbance from neighbors (twinned fires) or to check details of the acoustic project in the construction process and after construction.

We send our team of technicians to the site for a correct assessment of the situation in order to guarantee an adequate and rigorous response.

ACOUSTIC MEASUREMENTS IN SITU

To assess the conformity of the acoustic insulation indices of buildings required by Decree-Law No. 96/2008, we determined through acoustic tests in situ, the following insulation indices:

Measurement of sound insulation to aerial sounds between compartments. Determination of the sound insulation index. NP EN ISO 140-4: 2009, NP EN ISO 717-1: 2013, EN ISO 140-14: 2004, Note 3 of the LNEC Document, 13 April 2012

Measurement of sound insulation to aerial sounds from facades and facade elements and determination of the sound insulation index. Global method with loudspeaker NP EN ISO 140-5: 2009, NP EN ISO 717-1: 2013, Note 3 of the LNEC Document, 13 April 2012

Measurement of insulation to percussion sounds of pavements and determination of the sound insulation index NP EN ISO 140-7: 2008, NP EN ISO 717-2: 2013, EN ISO 140-14: 2004, Note 3 of Document LNEC, 13 of April 2012

Measurement of sound pressure levels of building equipment. Determination of the sound level of the particular noise NP EN ISO 16032: 2009, Note 4 of Document LNEC, April 13, 2012

Reverberation time measurement. Interrupted source method (engineering method)

NP EN ISO 3382-2: 2011