Social skills training is a type of psychotherapy that works to help people improve their social skills so they can become socially competent. SST is predominantly a behavioural therapy but cognitive therapy can also be used in some situations to maximise the success of SST.
Often a faulty toilet ballcock (fill valve) will cause resonance sounds like these. At least it's easy to check -- here's how to tell if this is the cause. Close the supply valves to all the toilets. If the noise disappears, open them one-by-one till the noise starts again. Replace the ballcock in that toilet.
If the washer is noisy or loud, particularly when the washer is filling, the water inlet valve may be at fault. Over time, mineral deposits can build up inside the valve and cause a restriction. If the water inlet valve is restricted, it will make noise during the fill cycle.