Dictaphones or Digital Voice Recorders (DVRs) are ideal for recording voice memos, interviews, conferences, meetings and phone conversations. The term Dictaphone is a brand name that refers to the version that uses cassette tapes to record, as opposed to the newer Digital Voice Recorders (DVR) that the save the audio to memory.

Microcassette dictaphones are easy. The quality of record depends on the device and on the cassette quality. Their advantage is low cassette price. You can buy a lot of cassettes and you won’t have to worry about record time. Additional functions – autoreverse, autostop, voice activation, tape counter, record indication. But such dictaphones are already in the past, so lets look at the digital ones.

Digital dictaphones record information to inner or changeable flash-memory. It is quite expensive, so you’ll have either to buy a larger memory, delete unnecessary files or transfer records to the PC. I wouldn’t recommend you to buy dictaphones without changeable memory, because you will always be restricted to the inner memory sizes and you won’t be able to extend it.

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A compact personal recorder.  Features large easy to use buttons and navigation display. Long battery life – up to 39 hours of use.

Main Features:-

• Built in 512MB Flash memory
• 3 Record modes: HQ 20hr 5min, SP 53hr 40min and LP 300hr 30min
• 4 Record Folders (max 100 files in each)
• Large LCD Display for quick viewing of file location
• Timer Recording (set a start and end time for a recording)
• File Management; single file erase, folder deletion
• Hi-Lo Microphone pickup
• Index Marking (10 per file)
• VCVA for Hands Free Recording 
• Fast and/or Slow Playback (30% faster / 20% slower)
• Mic & Earphone Jack
• Size: 102mm x 36mm x 20mm
• Weight: 63g including batteries

The record quality of digital dictaphone depends on the device, its microphone, intake duct, signal sampling rate and the method of its coding. Human ear can perceive frequencies from 20Hz to 20KHz. Normal speech is between 0.3-3.4 KHz, i.e. to understand, what the person says, the tape of 0.3-3.4 KHz will be enough. The rest is just additional noise. So if you want to tape only voice, buy the dictaphone under 4kHz (according to Nikewist theorem, the sampling rate should be 8 kHz ). If you want to record other sounds (music, the falling of objects), then you should buy 20kHz dictaphone (40kHz sampling rate). But remember that the wider is the strip, the bigger is the memory expenditure.