Tip 2: Establish a range, first.

Unless you have been blessed with good enough hearing or have reached the pinnacle of human hearing, don't stress about hearing the exact frequency or dB. Instead, start by giving yourself a range as wide, or wider, as you may need based on what you hear. This approach has helped me understand the frequency range better without the stress and frustration [which can easily deter anyone from moving along] of getting it right every time. It has also helped me develop my hearing. For example, this approach has helped me with EQ Cheetah [yes, I'm still on Level 1 [no shame: cat-like reflexes are another skill and sticky trackpad an impediment]], where I noticed I'm getting more answers right than wrong consistently. It has also helped me with other exercises, such as DB King. But giving yourself a range also sets the foundation at that moment, with long-term and short-term benefits, for working towards that single frequency and dB [achievable for some] with a clear, narrower focus. With practice, patience, and consistency, you'll see improvement over time sooner than you think.