The old recording machines were used to record voices in the early 1950's. The same machine could be used to play back the recordings.
Common research methods include experiments, surveys, interviews, observations, case studies, and content analysis. Each method has its own strengths and limitations, and researchers choose the most appropriate method based on their research question and goals.
interview
The three methods of investigation are document analysis, interview and observation. This will be determined by the particular type of investigation.
Audio engineering is associated with recording sound, storing the recordings and subsequently reproducing the recordings using all available means from the the very earliest recording and reproduction methods to the very latest.
Unconventiona and free style questioning methods that are unpredictable and of mixed orientation, i.e. behaviour, technical know-how and knowledge.
By computerized machine, mechanical machine, or paper ballot
Daniel Levinson has written: 'A guide to the clinical interview' -- subject(s): Medical history taking, Methods, Psychological Interview
You must monitor your machine from time to time. You could use visual inspection, or some other methods depending on machine. Most popular methods for rotating machinery are vibrodiagnostics, oil anlysis and proactive maintenance,
Focus Group Discussion, Community interview and questineerType your answer here...
milling, turning and shaping on a shaping machine .
money,machine,methods,materials
Interview method involves direct interaction with respondents, allowing for in-depth exploration of responses, while questionnaire method relies on written or electronic survey tools for collecting data. Interviews are more flexible, allowing for probing and clarifying responses, whereas questionnaires offer standardized questions for consistency. Interviews may be more time-consuming and resource-intensive compared to questionnaires.