Making subsonic signal range audible and integrated - Life Energy Fluctuation Meter circuit design

[Galileo Been]

Condition: By means of a roughly 50 micro Ampere DC current generated
with the aid of a 9 Volt battery, a signal of about 2 (two) Herz and
higher (occurring between the hand palms touching iron plates, for
instance) is obtained.

Problem to be solved: To make the signal audible - meaning, changed
into an intelligible sound that reflects the pattern of change, which
would be the amplitude (magnitude of change), and frequency (speed and
acceleration of change).

Specifically: To make an increasing range audible, that is, beginning
with the range of about 2 to 10 Herz, and switch to expand to a bigger
range of about 2 to 20 Herz, then 2-50 Herz, and also 2-100 Herz. And
eventually up further.

Any circuit design suggestion and recommendation of components is
appreciated - the results are intended for the public domain.

Koos Nolst Trenite
human rights philosopher and poet
http://www.angelfire.com/space/platoworld

 

[Jon]

Mr Bean
~
There are several VCO (Voltage Controlled Oscillator)chips on the
market. Convert the low frequency current to a voltage using either a
resistor and high impedance amplifier, or a current to voltage
converter (inverting op amp with current going to non inverting input,
and a feedback resistor). Use the resulting voltage to change the
free-running frequency of the VCO.
Regards,
Jon

 

[qrk]

Condition: By means of a roughly 50 micro Ampere DC current generated
with the aid of a 9 Volt battery, a signal of about 2 (two) Herz and
higher (occurring between the hand palms touching iron plates, for
instance) is obtained.

Problem to be solved: To make the signal audible - meaning, changed
into an intelligible sound that reflects the pattern of change, which
would be the amplitude (magnitude of change), and frequency (speed and
acceleration of change).

Specifically: To make an increasing range audible, that is, beginning
with the range of about 2 to 10 Herz, and switch to expand to a bigger
range of about 2 to 20 Herz, then 2-50 Herz, and also 2-100 Herz. And
eventually up further.

Any circuit design suggestion and recommendation of components is
appreciated - the results are intended for the public domain.

Koos Nolst Trenite
human rights philosopher and poet
http://www.angelfire.com/space/platoworld

Use a voltage controlled oscillator. You could brand this a "Life
Theremin" and record the music of life.