How to choose loudspeakers

Is actually a loudspeaker to be within the scope of audio-frequency electric power signal through the transducer (speaker unit), put it into a sound pressure level of audible sound enough. In order to correctly select the right loudspeaker , you must first understand the properties of sound signal, and then ask the speaker to "genuine," to restore the audio signal into a real natural sound.The human voice and a variety of music is a random signal, its waveform is very complicated. Frequency range of audible sound in general up to 20Hz-20kHz; in which the scope of the language spectrum around 150Hz-4kHz or so; and a variety of music, the spectrum range up to about 40Hz-18kHz. The average spectral energy distribution as follows: bass and the bass part of the largest alt part of the second, and pitch some of the smallest (about the bass part of the energy of the 1 / 10); the human voice of the energy is concentrated in the 200Hz-3.5kHz frequency. The audible sound of random signal amplitude of the peak is larger than its average of 10-15dB (or even higher point). Therefore, loudspeaker to be able to correctly re-release of these random signals, ensuring playback of sound beautiful sounds, loudspeaker must have a wide frequency response characteristics, adequate sound pressure level and large-signal dynamic range.We would like to spend a relatively small input signal power to obtain a large enough sound pressure level, which called for speakers with a high-efficiency electric power conversion into a sound pressure sensitivity.

 

 

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