Octave band equivalent sound levels (Leq, integrated average over measurement time span) were examined for ambient conditions near the existing chiller (with the chiller off) and at the nearest residential property line with the chiller running at 25% capacity.
What does OB stand for?
OB stands for Octave Band
This definition appears very frequently and is found in the following Acronym Finder categories:
- Science, medicine, engineering, etc.
See other definitions of OB
We have 18 other meanings of OB in our Acronym Attic
- Obliterative Bronchiolitis
- Observatoire de Besançon
- Occult Blood
- Ocean Beach (California)
Samples in periodicals archive:
Pigmented male guinea pigs were exposed to a noise (4 kHz octave band, 100 dB SPL), 8 h/day for 3 days consecutively.
So, from simple baseline surveys to full 1/3rd octave band analysis, all measurements can be performed quickly and easily through a simple, intuitive menu driven system.
He measured the compressor's overall noise level and frequency content using a hand-held octave band meter.
Because the amount of absorption depends on frequency, the absorption is usually given for the octave bands between 125 Hz to 4000 Hz.
The animals of group 1, 2, 3, 4 were exposed to the noise (4 kHz octave band noise, 100 dB SPL), 8 hours per day for 3 days consecutively and received normal saline, corn oil, 10 mg/kg vitamin E, 50 mg/kg vitamin E respectively daily by intraperitoneal injection from 3 days before the noise exposure, through the 3 noise exposure days to 3 days after the noise exposure.
Room 1/3 octave band sound power level and resulting calculated room NC (noise criteria) level 2.