In order to verify the acoustic character of the standing wave field between the noise source and the secondary source in ducts under the control of the active noise attenuation system, the authors made the single frequency noise cancellation experiment in low frequency bands on the adaptive active noise control experimental system designed by their own.

The studying results have proved that under the ideal noise cancellation condition the reflection coefficient module of standing wave field between the noise source and the secondary source is equal to 1, the reflection coefficient at the secondary source is equal to 1, the acoustic impedance at the position is equal to zero.

The film structure determined temperature and standing wave field s characters which formed in laser irradiated optical thin film is presented, the temperature and standing wave fields is calculated for IR filter as an example.

Acoustic performances of underwater acoustic structure are studied based on finite element me-thod,and results are determined directly by deriving the standing wave data formed by incident wave and reflected wave.

Further,the standing wave distribution in the entire device was calculated using the Fresnel matrix method of optical thin film.

Acoustic performances of underwater acoustic structure are studied based on finite element me- thod,and results are determined directly by deriving the standing wave data formed by incident wave and reflected wave.

Study on vibrating velocity in high-intensity standing wave field;

Three-level atom in a standing electromagnetic wave;

The system of an atom interacting with a standing electromagnetic wave is very complicated.