Recording equipment: The researcher himself serves as a sound recorder, and prepares two recording equipment, a mobile phone and a voice recorder, to ensure the integrity of the data.
Recording equipment: The researchers themselves act as recorders, preparing two recording devices, mobile phones and tape recorders, to ensure the integrity of the data.
Recording equipment: the researcher himself acted as a recorder, and prepared two recording equipment, mobile phone and recorder, to ensure the integrity of the data.<br>