"From that time Jesus began to preach, and to say, Repent: for the kingdom of heaven is a hand." (Matthew 4:17) Contrast the above with this passage, this prophecy from Isaiah that points to His ministry:
"He shall not cry nor lift up, nor cause His voice to be heard in the street." (Isaiah 42:2)
I believe the above then is contrasted once more against John the Baptist. Either way, this idea that Jesus frequented the local towns, "teaching and preaching" is contained herein. But how did He do it? How did He deal with the atmosphere of each while maintaining both His sanity and His mission? Because if you're nothing if not spiritually sensitive and you clash with the embedded attitude of a city, there must be a higher power to which you appeal.
Heard on the street
"And seek the peace of the city whither I have caused you to carried away captive, and pray unto the Lord for it: for in the peace thereof shall ye have peace." (Jeremiah 29:7)
So this is a little more removed from both John yelling at the top of His lungs and also Jesus doing what He did in whatever way suited Him. The above is Jeremiah showing (by God) a little counterintuition toward what one might think regarding that nebulous feeling. That nebulous feeling in the air that you can't pinpoint on one person but that you feel resident in everyone. I'd wager to say it's a spiritual one (as opposed to purely psychological). See, God doesn't care about any of that. He doesn't care what people think about you--nor should you. He does, however, care what people think about Him. Any self-contained little city, content with its own laurels, may well not be open to receiving a word from the Lord.
"And they were offended in Him. But Jesus said unto them, A prophet is not without honour, save in His own country, and in His own house. And He did not many mighty works there because of their unbelief." (Matthew 13:57-58)
He tried, He really did. Think about it though. Here you have Jesus. The culture in which He walked had not been saturated with a watered-down image of Him and so wouldn't have recognized Him for who He was by look alone. Anyone who found out He was the Son of God found it out, not by the timbre and volume of His voice, but by the depth of their sincerity and humility. This (I believe) is why He needn't raise His voice. Because "the Lord knoweth them that are His." (2 Timothy 2:19)