Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: acoustic agglomeration; smoke detector response; enhanced deposition; soot deposition. Includes bibliographical references (p. 146-147).

Thesis (M.S. of B.C. & I.F.M.)--College of Architecture, Georgia Institute of Technology, 2004. Directed by Linda Thomas-Mobley. / Includes bibliographical references (leaves 69-70).

Thesis (Ph. D.)--Victoria University (Melbourne, Vic.), 2007. / Includes bibliographical references.

No description available.

Thesis (M.S.) -- Worcester Polytechnic Institute. / Keywords: speech intelligibility; voice alarm communication system; common intelligibility scale (CIS); speech transmission index (STI). Includes bibliographical references (p. 80-82).

Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Post-fire reconstruction often includes the analysis of smoke alarms. The determination of whether or not an alarm has sounded during a fire event is of great interest. Until recently, analysis of smoke alarms involved in fires has been limited to electrical diagnostics, which, at best, determined whether or not a smoke alarm was capable of alarm during the fire event. It has subsequently been proposed that evaluation of the soot deposition around a smoke alarm horn can be used to conclude whether a smoke alarm has sounded during a fire event. In order to evaluate the effectiveness of using enhanced soot deposition patterns as an indication of smoke alarms sounding within a fire event, four test series were undertaken. First, a population of smoke alarms representative of the available market variety of horn configurations was selected. This population was subjected four test series. Test Series 1 consisted of UL/EN style experiments with fuel sources that included flaming polyurethane, smoldering polyurethane, flaming wood crib, and flaming turpentine pool. In Test Series 2, alarms were exposed to "nuisance" products from frying bacon, frying tortillas, burnt toast, frying breading, and airborne dust. Test Series 3 exposed the alarms to the following fire sources: smoldering cable, flaming cable, flaming boxes with paper, and flaming boxes with plastic cups. Test Series 4 included new, used, and pre-exposed smoke alarms that were exposed to two larger scale fires: a smoldering transitioning to flaming cabinet/wall assembly fire and a flaming couch section. The results from all four series were used to generate a hueristic for use in evaluating alarms from fire events. These criteria were blindly tested against the population of alarms to develop a correlation between the criteria and the previously tested smoke alarms. The results support the evaluation of soot deposition on smoke alarms exposed to a fire event as a viable method to determine whether or not an alarm sounded, without false positive or negative identifications.

Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / M.S.

Speech intelligibility of voice alarm communication systems is extremely important for proper notification and direction of building occupants. Currently, there is no minimum standard to which all voice alarm communication systems must be held. Tests were conducted to determine how system and room characteristics, and the addition of occupants, affect the intelligibility of a voice signal. This research outlines a methodology for measuring the speech intelligibility of a room and describes the impact of numerous variables on these measurements. Eight variables were considered for this study: speaker quantity and location, speaker power tap, sound pressure level (SPL), number and location of occupants, presence of furniture, location of intelligibility measurements, data collection method, and floor covering. All room characteristics had some affect on the room intelligibility; the sound pressure level of the signal and the number and location of occupants had the greatest overall impact on the intelligibility of the room. It is recommended, based on the results of this study, that further investigation be conducted in the following areas: floor finishes, speaker directivity, various population densities, furniture packages and room sizes.