Finally, i have tried in full myphone T23 Duo’s sound recorder during my coverage with the business plan making seminar of the “Search for W.I.N.N.E.R.s” yesterday at the USC-SVD Study Mission Center.
All the voice recordings were used in yesterday’s episode of my radio show–“USC-Kapamilya Negosyo Na” over DyAB1512.
The result was amazing considering most cellphones have omni-directional microphone. Omni-directional microphones pick up sounds from all directions as its pick-up pattern.
The manual of the T23Duo doesn’t speak about its pick-up pattern characteristic whether it is omni-directional or cardioid which is widely-used in broadcasting. My suspicion, based on the way it picks up sounds during my recording, T23Duo has a cardioid microphone.
Since the recording audio format was in compress and lossy format AMR, the recorded voices are a little dull. The Adaptive Multi-Rate (AMR) is common in GSM and UMTS mobile phones because of its speech format. But its sampling frequency is 8khz at 13-bit which is equivalent to the sound of a land line telephone–considered the lowest audio sampling quality.
Hence, i made a little audio enhancement on the recording using Adobe Audition to improve the quality. The tone is adjusted by lowering the low-band frequencies while increasing the mid-range and high frequencies using the graphic equalizer on my audio editing software.
The final result was amazing. It’s of broadcast quality. As if, i am using a professional voice recorder for my entire coverage of the event.