ISO 16283-2:2015 pdf free.Acoustics – Field measurement of sound insulation in buildings and of
building elements – Part 2:Impact sound insulation.
4 Instrumentation
4.1 General
The instruments for measuring sound pressure levels, including microphone(s) as well as cable(s), windscreen(s), recording devices and other accessories, if used, shall meet the requirements for a class 0 or 1 instrument in accordance with IEC 61672-1 for random incidence application.
Filters shall meet the requirements for a class 0 or 1 instrument in accordance with IEC 61260.
The reverberation time measurement equipment shall comply with the requirements defined in Iso 3382-2.
The impact sources shall meet the requirements given in Annex A.
4.2 Calibration
At the beginning and at the end of every measurement session and at least at the beginning and the end of each measurement day, the entire sound pressure level measuring system shall be checked at one or more frequencies by means of a sound calibrator meeting the requirements for a class 0 or 1 instrument in accordance with IEC 60942. Each time the calibrator is used, the sound pressure level measured with the calibrator should be noted in the field documentation of the operator. Without any further adjustment, the difference between the readings of two consecutive checks shall be less or equal to 0,5 dB. If this value is exceeded, the results of measurements obtained after the previous satisfactory check shall be discarded.
4.3 Verification
Compliance of the sound pressure level measuring instrument, the filters and the sound calibrator with the relevant requirements shall be verified by the existence of a valid certificate of compliance. If applicable, random incidence response of the microphone shall be verified by a procedure from IEC 61183. All compliance testing shall be conducted by a laboratory being accredited or otherwise nationally authorized to perform the relevant tests and calibrations and ensuring metrological traceability to the appropriate measurement standards.
NOTE Unless national regulations dictate otherwise, it is recommended that the sound calibrator be calibrated at intervals not exceeding one year, the compliance of the instrumentation system with the requirements of IEC 61672—1 should be verified at intervals not exceeding two years, and the compliance of the filter set with the requirements of IEC 61260 should be verified at intervals not exceeding two years.
6 General
Determination of the impact sound insulation in accordance to this part of Iso 16283 requires that one room is chosen as the receiving room into which sound is radiated due to an impact source operating on a partition. The room or space in which the impact source is operated is referred to as the source room.
The measurements that are required include the sound pressure levels in the receiving room with the impact source operating, the background noise levels in the receiving room when the impact source is switched off and the reverberation times in the receiving room.
Two impact sources are described: the tapping machine and the rubber ball.
Two measurement procedures are described that shall be used for the sound pressure level, the reverberation time and the background noise; a default procedure and an additional low-frequency procedure.
For the sound pressure level and the background noise, the default procedure requires measurements to be taken in the central zone of a room at positions away from the room boundaries. With the tapping machine as the impact source, the default procedure for all frequencies is to obtain the energy- average sound pressure level using a fixed microphone or a manually-held microphone moved from one position to another, an array of fixed microphones, a mechanized continuously moving microphone or a manually scanned microphone. With the rubber ball as the impact source, the default procedure for all frequencies is to obtain the energy-average sound pressure level using a fixed microphone or a manually-held microphone moved from one position to another or an array of fixed microphones.
For the sound pressure level and the background noise with the tapping machine as the impact source, the low-frequency procedure shall be used for the 50 Hz, 63 Hz, and 80 Hz one-third octave bands in the receiving room when its volume is smaller than 25 m3 (calculated to the nearest cubic metre). This procedure should be carried out in addition to the default procedure and requires additional measurements of the sound pressure level in the corners of the receiving room using either a fixed microphone or a manually-held microphone.ISO 16283-2 pdf download.