Spectrum Analyzer and Equalizer

Posted on Nov 18, 2012

The circuit shown in Figure 1 uses only two ICs, and has a bandwidth that is adjustable from more than one octave down to a tenth of an octave. As shown, the frequency range is 20 Hz. to 20 KHz. in three bands, although a fourth subsonic band could be added to allow very low frequency analysis. A low-noise mike preamplifier is included, and a line input is also available with up to 20 dB of gain. Of course, you could use a mike preamp in your console instead, but at the expense of portability.

Spectrum Analyzer and Equalizer
Click here to download the full size of the above Circuit.

Selecting a suitable measuring microphone is crucial for serious room analysis, since no doubt the mike will be the weakest link in the measuring chain. First, it should be omni-directional because reflections off walls, ceilings and floors contribute gre

Leave Comment

characters left:

New Circuits



Popular Circuits

Video amplifier provides digital gain control
Pulse generation by interrupting a light beam
Solid-State Relay
microcontroller Driving low-voltage H-bridge directly from MCU
dry model 1 isca tracker
led lights using analog flip flop circuit diagram
Battery Replacement Power Supply