Pushed voice and retrieved voice enrollees included in the survey had received an average of 3.1 and 3.7 messages, respectively, at the time of survey.
To understand the difference in delivery success and quality between the 3 different messaging modalities (pushed SMS, pushed voice messages, retrieved voice messages), we collected and analyzed information from routine monthly monitoring data and quarterly phone-based surveys with users.
To determine the difference in delivery success of health messages delivered through pushed SMS, pushed voice messages sent to personal phones, and voice messages retrieved from a community phone ("retrieved voice messaging"), as well as the difference in quality of the user experience.
Although delivery success was the lowest for retrieved voice message subscribers, approximately 1,200 voice messages were successfully retrieved each month.
Pushed SMS and retrieved voice enrollees were more likely than pushed voice enrollees to recall the last message received, but the observed differences were not statistically significant.
To that end, AT&T's patent identifies unlocking a cell phone where a "voice selection is analyzed to determine a corresponding selection ID, and a voice print is retrieved from the storage location corresponding to the selection ID and to an ID of the wireless telephone".
A security official said the main part of the "black box" containing the voice recorder was retrieved hours after teams recovered the jet's data recorder.
Message delivery success was highest among pushed SMS subscribers and lowest among retrieved voice subscribers.
In addition, among retrieved voice message enrollees, the sample was not randomly selected.
