Each key on a touch-tone telephone makes a slightly different sound when touched. this difference is due to the pitch of sound produced by each key. the difference in pitch is determined by the of the sound waves coming from each key.

Frequency

Explanation:

It s actually the frequency of the sound waves which as perceived as pitch by our ears. Some sound waves vibrate more and hence the pitch is more and some vibrates less and the pitch is less.

The more the oscillation is the higher is the pitch and lesser the oscillation the lower is the pitch which gives us the differences.

whats

we can all learn from our past mistakes because we all have different ways of learning different types of techniques. my way may or may not another classmate remember and have the repetition to acknowledge such standard. such as remembering acronyms. using abbreviations to us remember keep things in order in our memory. this us figure out what comes next in the sequence. if so, what we have is a sentence of just letters all in caps. we either know the meaning or have no idea what it stands for. most of the time we know the meaning and context. but most of us who don't know, should learn by having a quick glance at what needs to be remembered. such as repetition in the memory for acronyms. one way that me, is the fact that i'm always doing math and english assignments. so we have to remember specific meanings such as soapstone for documents, such as citing correctly. or pemdas for doing the equations correctly, even if it's the super long way. this works for everyone. you just have to find what works for you by practicing and repetition daily.