Has Cardioid Pattern
Shure SM58 has the cardioid polar pattern, mics that use this pattern have a wide on-axis receiving area and max rejection at 180 degrees off-axis. To further explain, this pattern is more directional and sensitive to the front of the microphone in the on-axis position, and reduces in sensitivity towards the sides and a null point in the rear of the microphone.
Lowest Frequency
Shure SM58 has its lowest frequency at 50Hz, a microphone with a low frequency below 50Hz is good for miking, and toms, or if you're in search of a bass drum mic.
Highest Frequency
The Shure SM58's upper limiting frequency is 15,000Hz, meaning that sound waves at a frequency above 15,000Hz won't be captured. In an ideal situation, a mic's frequency response should be a one-to-one reproduction, however, some vibrations get lost along the way and some of the info doesn't make it to the output recording.
Microphone Sensitivity
Shure SM58's sensitivity is measured at 1.6mV/Pa, this tells you what the electrical output of a microphone will be for a given acoustic input. The higher the number, the more sensitive the microphone is.
