Advice for hiss removal

[f3choo]

Hi,

I am using Rh-910 MD for voice recording in seminar or interview. Unfortunately I am getting heavy hiss in all the recordings .

my microphone is audio-Technica AT9830 ,Specification as follow;

Model: AT 9830 Element: Condenser, electret

Polar Pattern: Stereo, directional Frequency Response: 100 -12,000Hz

Sensitivity: 58dB +/-3dB, 1 kHz at 1 Pa Impedance Ω: 680Ω

Cable Length:1.0m, come with 3.5mm terminated Weight: 5gram with cable

Phantom: tap power from DV-camera or MD player with mic-in power

Recorder’s Setting:

Record mode:Hi-SP

Record level: Auto (AGC)

Mic sensitive: High

I hope to ger rid of hiss during recording,I have some doubts here;

1. Which one generate hiss, Recorder or Mic?

2. If problem came from Mic, is it any Mic(Mono or Stereo) is good for voice

recording without hiss? (The mic must be small enough to mount on glass or

shirt).

3. If I using Pre-amp mic with line in(Instead of Mic in), does it will eliminate the

hiss during recording?

Any suggestion ? Appreciate for your input. Thanks in advance.

[greenmachine]

Hiss is generally a problem if recording quiet sounds from a distance with miniature microphones.

You can:

-move closer to the source

-use (large diaphragm) microphones with lower self noise

-use a quieter preamp (makes only sense with better microphones, if at all)

-use software afterwards for noise reduction

http://forums.minidisc.org/index.php?showtopic=10744