The Problems are these:
1. Sonum intendere quousque velis; or, Datum sonum ad datum gradum intendere.
2. Sonum extendere quousque velis; or, Datum sonum ad datum distantiam extendere seu propagare.
3. Sonum transire ab extremo ad extremum & non per Medium.
1. The first is, To make the least Sound (by the help of Instruments) as loud as the greatest; a whisper to become as loud as the shot of a Cannon.
By the help of this Problem, the most minute Sounds in Nature may be clearly and distinctly heard.
2. The second is, To propagate any (the least) Sound to the greatest distance.
By the help hereof any Sound may be convey'd to any, and therefore heard at any distance, (I must add, within a certain, tho' very large Sphere.)
Moreover, by this means, a Weather-cock may be so contriv'd, as that with an ordinary blast of Wind it shall cry (or whistle) loud enough to be heard many Leagues: Which happily may be found of some use, not only for Pilots in mighty tempestuous Weather, when light Houses are render'd almost useless, but also for the measuring the strength of Winds, if allowance be made for their different moisture. For I conceive, that the more dry any Wind is, the louder it will whistle cæteris paribus; I say, cæteris paribus, because, besides the strength and dryness of Winds or Breath, there are a great many other things (hereafter to be considered) that concur to the increase or magnifying of Sounds, begotten by them in an Instrument exposed to their Violence, or blown into.
3. The third Problem, is, That a Sound may be convey'd from one extreme to the other (or from one distant place to another) so as not to be heard in the middle.