acoustic near field的用法和样例：
- Previous HRTF measurement were lack of near field data.
- The cyclostationary near field acoustic holography (CYNAH) technique is proposed for cyclostationary sound fields in previous papers.
- The calibration results using MFCT close to the results by near field.
- The beam quality is good and the near field is avoid of filamentation.
- scanning near field acoustic microscope