What is it about?
The study measured the power efficiency of the carbon nanotube thin-film (CNT) speaker for different types of signal processing input. The CNT doubles all frequency content (i.e. if you put in 1kHz voltage wave you hears a 2kHz pressure wave). Therefore, you have to pre-condition or pre-process the signal before you put the signal into the speaker. This paper quantified the efficiency differences for different signal processing techniques.
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Why is it important?
The CNT speaker uses themoacoustics (i.e. heat to make pressure waves). This process is not efficient. This paper quantifies the baseline for the CNT speaker and also reports the efficiency of other known signal processing methods.
Perspectives
This paper sets the baseline for all future efficiency development of the carbon nanotube loudspeaker. The data presented quantify the speakers efficiency and allows for a benchmark when making future modifications.
Troy Bouman
Michigan Technological University
Read the Original
This page is a summary of: Experimental quantification of the true efficiency of carbon nanotube thin-film thermophones, The Journal of the Acoustical Society of America, March 2016, Acoustical Society of America (ASA),
DOI: 10.1121/1.4944688.
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