Pitch varying tone

[jwhong]

Copying from [https://moosh.im/f/topic/alternative-to-speaking/ a post in the support forum]: Diode beeper: if drop voltage is below x volts beep (x is user adjustable)
Voltage : beep if reading is below or above set value
Same idea for resistance, current and even temperature.

This would be very useful in debugging scenarios, for example when checking supply voltage to be in a specific range.

Another idea would be to change the tone pitch depending on the reading.
Example: 0V would produce a tone of 100Hz and max scale would make 2kHz tone.
Maybe also let the user select voltage range (instead of 0V to max scale, something like 5V to 15V) and frequency range.

Just imagine a situation where you have a multimeter and a mobile phone in a pocket while measuring some voltages and listening to the tones trough headphones (from mobile), no need to look at the screen and it’s much faster than reading to speech. Maybe not as accurate, but good enough for most cases where you cant look at the screen.

[Sembazuru]

There is previous art similar to this. The EE where I used to work had an old continuity checker box that would adjust pitch depending on the resistance reading. As I recall the pitch would go up as resistance went down. (I'm not sure what the threshold was to start the lowest tone.) This came in handy when checking cables as partial/poor connections would have a lower tone where the Fluke 87V that I used would have not differentiated (by tone) the poor connection from a good connection. (And when checking the beeps and anti-beeps on a large pin connector, do you really take the time to watch the display, or just run through the pins just listening to the beep?)