How to Improve the Watch-O-Scope Microphone Sound
The ability of the WOS software is unbeatable in itself. It is a powerful tool for the analysis of mechanical watches.
However, getting an appropriate signal from the clock or mechanism to be analyzed is a problem.
These are the reasons.
1. A clock with a very weak sound
2. A microphone with inefficient design.
3. improper shielding of the cable that leads the signal to the pre-amplifier.
4. An environment where sound sources abound. Which are not few: transformer, cell phone chargers, laptop chargers. Fluorescent tubes, saving lamps, monitors, etc. About this, they can change from person to person and from what I've seen they change from moment to moment in an environment or space.
5. As expected, each watch has a particular pattern of frequencies that produce its characteristic tick-tock.
My proposal and that has worked very efficiently is as follows.
A. Make an analysis of the "noise" produced by the microphone with the aid of a spectrum analyzer. I am using Spectra Plus 5.0
B. Make an attenuation of all annoying frequencies. (Those in the 60 or 50 Hz network). This we do with the help of APO EQ, and the PEACE EQ extension.
C. Make a gain in the frequencies that most clocks represent. Same as APO EQ + PEACE. (This is based on the document that indicates which are the most outstanding frequencies in the majority of watches.
www.iaeng.org/publication/WCE2007/WCE2007_pp624-629.pdf
D. Check the microphone with a suitable watch.
STEP ONE. ANALYSIS OF THE MICROPHONE SPECTRUM WITHOUT A CLOCK TO LISTEN
STEP 2 SELECTIVELY APPLY APO EQUALIZER + PEACE.
THIS IS THE RESULT:
STEP 3 CHECK THE MICROPHONE.
On the Watch-O-Scope screen. Scope Mode.
ANOTHER EXAMPLE OF HOW TO IMPROVE SIGNALING BY APO EQ + PEACE
And now we can see the analysis of the implementation of the filter.