cant understand the logic of the problem specially the last line of the problem need a program written

The following lists the sound level in decibels for several common noises: Noise Decibel Level (dB) Jackhammer 130 Gas lawnmower 106 Alarm clock 70 Quiet room 40 Write a c++ program that reads a sound level in decibels from the user. If the user enters a decibel level that matches one of the noises in the table, then your program should display a message containing only that noise. If the user enters a number of decibels between the noises listed, then your program should display a message indicating which noises the level is between. Ensure that your program also generates reasonable output for a value smaller than the quietest noise in the table and for a value larger than the loudest noise in the table.

cant understand the problem