The phrase "ambient origin" is correct and usable in written English.
It can be used in contexts discussing the source or background of something in relation to its surrounding environment or atmosphere.
Example: "The ambient origin of the soundscape created a calming atmosphere in the room."
Alternatives: "environmental source" or "surrounding origin".
True exposure was defined as personal exposure to PM2.5 of ambient origin.
PM2.5 of ambient origin contributed 62%, on average, to the total personal PM2.5.
To estimate personal PM2.5 of ambient origin we used the SO 4 2 − tracer method.
In addition, personal PM2.5 of ambient origin was estimated rather than measured.
People are therefore exposed to concentrations of PM2.5 of ambient origin at near ambient concentrations for 24-hr each day.
Since PM2.5 of ambient origin could only be determined for five cities, personal exposure to total PM2.5 was also considered.
In contrast to PM2.5 from outdoor origin, ambient ozone levels have lower correlations with personal exposure (Avol et al. 1998; Sarnat et al. 2000, 2002); therefore, the ability to detect effects of ozone will likely be reduced due to greater misclassification.
The results from such studies indicate that most DNA adducts detected in cells incubated with extractable organic matter (EOM) from ambient air have their origin in the low concentrations of carcinogenic PAH representing a very low part of EOM total mass (0.03 0.17%; [ 199]).
It struck me as natural and true to Howe's sense of language that words should chart a passage toward the printed page from their origins in ambient space.
However, an enormous number of different chemical species are associated with the various types of ambient particles, depending upon their source origins (e.g., Cooper and Watson 1980).
The detailed origin of the ambient sound was undeterminable, but it resulted in an increase in broadband noise up to about 70 kHz starting at sunset and lasting until sunrise (Fig. 6).
