Amplification and damping of acoustic intensity were demonstrated using thermoacoustic energy conversion. A differentially heated regenerator was installed near the velocity node of the resonator and thereby a high specific acoustic impedance and a traveling wave phase are obtained. The gain of acoustic intensity, resulting from the traveling wave energy conversion, reaches 1.7 in a positive temperature gradient and 0.3 in a negative gradient. The obtained results will contribute to the development of new acoustic devices using thermoacoustic power amplifiers and silencers.
|Journal||Physical Review E - Statistical, Nonlinear, and Soft Matter Physics|
|Issue number||6 2|
|Publication status||Published - 2004 Jun 1|
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics