The United States, the world's biggest oil consuming country, consumed 18.5 million barrels of oil per day (mbd) in 2012, which accounted for nearly 20% of the world's total oil consumption per day. The highest level of oil consumption in US history was 20.8mbd, which occurred in 2005.
It is also important to be conscious of the speakerâs sensitivity rating, measured in decibels (dB). The higher the number, the less power a speaker requires in order to reach higher volumes without distortion. For most car speakers, this number typically ranges between 88 to 92 dB.
Midrange frequencies would be 500Hz to 5,000Hz, and high frequencies would be 5,000Hz-20kHz. However, the range is often further divided into sub categories such as midbass and upper midrange.Familiarity with these ranges enables us to determine how a speaker should sound based on the Frequency Response Graph.idrange frequencies would be 500Hz to 5,000Hz, and high frequencies would be 5,000Hz-20kHz. However, the range is often further divided into sub categories such as midbass and upper midrange. Familiarity with these ranges enables us to determine how a speaker should sound based on the Frequency Response Graph.