In life there are many things a male child must have at their desk. Among these items are, a set of little litty-bitty screw drivers, a full set of screw drivers, a set of small needle nose pliers (straight and hooked nose), small channel lock pliers, wire strippers, a small crescent wrench, digital mult-meter, a postal scale that can weigh little things and big plates of food, a quality 10X jeweler's loupe, a way cool compact LED flashlight with rechargeable batteries, a small folding pocket knife and a sound meter.
Now that one has these basics, they can do basic repairs at their desk and tell if their neighbor's television is up too loud.
My advice, if your finances will allow, stop and buy a sound meter. Depending on quality and features, one can buy a sound meter for between thirty and a hundred U.S. Dollars. I paid eighty dollars but in the U.S. one can buy at their local Radio Shack, a sound meter for $50.00.
I paid more because I wanted better but the Radio Shack model is the forum standard.
One can go cheaper but in doing so there are durability and accuracy issues as cheaper sound meter can and will go wonky fast, all the while giving the impression that they're working just fine. I post from personal experience as I tried out several brands of sound meters. I have an older digital sound meter and it's been surprisingly dependable but it doesn't measure low and for me that's a draw back as I find need to go <50dB in measurements as you'll find that once you have a sound meter you'll want to take measurements that are <40dB.