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Вопрос по уровню шума ДВС лодок

Metanol

где посмотреть условия замера шума, знаю что не больше 80дб но на каком расстоянии от среза выхлопной трубы

на полных оборотах меряют?

gogofear

Вот из Правил NAVIGA:

  1. Methods for measuring noise levels in the FSR category

7.1 General

(1) The measurement microphone must be positioned as follows:

  • Height 1000 mm approx. X 200 mm above water level
  • Position 25 meters to the right for FSR-V and to the left
    for FSR-H at the right angle to the centreline of the FSR
    course and 22 meters away from the line connecting the two
    lowest buoys.
  • The measurement microphone must be shown at right angles
    and with the connecting line of the two lowest buoys and
    securely attached.

(2) It is not necessary to pass the noise measuring equipment at
full speed.

(3) Faults with a silencer which cause excess noise level must be
corrected immediately. The model must be taken off the water on
completing the commenced lap, failing which the competitor will
be disqualified.

7.2 Measuring methods in FSR-H classes

(1) At least one noise measurement must be taken for each model
during the race, under the following conditions:

  • There should be no other boat within 15 meters around the
    model being measured.
  • The noise measurement must be taken when the boat is on
    the base line at least 15 meters away from the microphone.

(2) When more than one measurement is taken, the recorded noise
level will be the average of all measurements.

(3) The competitor must be advised immediately after the first race
if their boat exceeds 80dB/A. If after the second race the boat
still exceeds the noise level they will receive a warning and if
during the third race the noise level is exceeded they will be
immediately disqualified.

7.3 Measuring methods in FSR-V classes

(1) At least three noise level measurements must be taken for each
model during the race, under the following conditions:

  • There should be no other boat within 15 meters around the
    model being measured.
  • The noise measurement must be taken when the boat is on the
    base line at least 15 meters away from the microphone.
  • The measurements must be evenly spaced during the race.

(2) The competitor must be advised immediately if their boat
exceeds 80dB/A. If the second measurement also exceeds the noise
level they will receive a warning and if the third measurement
exceeds the noise level they will be immediately disqualified.

Извините, что на английском, но на русском не нашел!!

С Уважением

Гого

Metanol

спасибо, а на О тоже самое что на Н или другое, меня только офшоры интересуют

в общем меряют лодку когда она на ходу, растояние двольно примерное, спасибо, условия понятны