@Ron, that's exactly the reason I've read why so many are looking at the belted extruders. Noise. All of the belted extruders seem to either advertise noise concerns the reason they exist, or being quiet as a key feature of their design.
The later generations of the Greg's Wade extruder has the herringbone teeth to help with backlash (and the associated noise)... no idea how the noise of one of those compares to the Titan though... There's an interesting history of the "Wade" extruder design here, if you haven't seen it:
I admittedly haven't done a huge amount of research yet, but this extruder looks promising to me:
"Belted Extruder v4"
No makes yet on Thingiverse, but the prior generation seemed to have good feedback:
"Belted Extruder v.3 for 1.75"
Another popular looking design is this one:
"Itty Bitty Belted Extruder"
Perhaps of interest on that last one is this user comment:
May 24, 2017
I was originally going to build the dual flex first but due to the large footprint I decided to go with the Itty Bitty first but even then it was wider than I liked and I wanted to try and use the hot end assembly I was already using on my FT-5 that uses the cooling block and heatsink. I ended up redesigning the body and now it is the same width as the FT-5 stock carriage assembly which is about 56mm. I got it up and running last night and initially set it up with 644.2 for E-steps but it's obviously over extruding and it was too late to go through the calibration steps to figure my exact number. The parts I got from you worked great and I'm amazed at how fast I can push filament through the hot end without skipping a step. I think I could push a Volkswagen sized clog through the hot end with this thing! Once I make a few changes to the body design and I'm happy with it I will post the part with the mounting plate for the FT-5 along with your info for ordering parts to build it. My next step is then a dual for the FT-5 that has one extruder for flexible and one for standard filaments and stay as close to the footprint of the original extruder assembly. There's room to grow on the X axis and height isn't an issue however real estate on the Y axis is limited so I will have to be creative with this one. I definitely like the belt over the gears for the drive and playing with belt length will give me some more room to be creative with the stepper placement.
@Flash_C4 seems to match a user here on the forum... @Flash_C4, how are things working out for you?