Audio frequency device for audible eyes off measurements

An apparatus comprising:

• an absolute value circuit capable of converting a bipolar input signal into a unipolar signal;
• a polarity sensor capable of identifying a polarity of the bipolar input signal and generating a polarity control signal;
• a frequency generation circuit capable of generating a plurality of different waveforms, each having an audio frequency based on a magnitude of the bipolar input signal and a sound based on a polarity of the bipolar input signal, wherein the plurality of different waveforms comprises any mutually distinctive sounding waveforms including at least one waveform modulated by tremolo comprising one of the sine waveform, the square waveform, the saw-tooth waveform, and the triangle waveform;
• and
• an audio transducer connected to the frequency generation circuit capable of outputting an audible tone from the plurality of different waveforms, the audible tone comprising a pitch that varies with a magnitude of the unipolar signal and that is different for positive or negative values.

A method for presenting electrical measurements, the method comprising:

• receiving a bipolar signal to form a bipolar input signal;
• identifying a polarity of the bipolar input signal;
• generating a polarity control signal;
• converting the bipolar input signal to a unipolar signal;
• generating a frequency signal proportional to the unipolar signal;
• generating a particular waveform from a plurality of possible waveforms using the frequency signal, the polarity of the bipolar input signal, and the polarity control signal, wherein the plurality of possible waveforms comprises any mutually distinctive sounding waveforms including at least one waveform modulated by tremolo comprising one of the sine waveform, the square waveform, the saw-tooth waveform, and the triangle waveform;
• and
• converting the particular waveform to an audible tone, the audible tone comprising a pitch that varies with a magnitude of the unipolar signal and that is different for positive or negative values.