Portable low-frequency sound field device

The utility model relates to a portable low-frequency sound field device for measuring a piezoelectric detector or a hydrophone receiving sensitivity particularity by low frequency, which consists of a sealed sound pressure tank, an internal driving sound resource and a driving circuit, and is mainly used for supplying the required sound field condition on the measurement of different piezoelectric detectors or hydrophones receiving sensitivity particularity by low frequency. The entire device is a portable structure, the mobility, and the installation and the operation are simple, which can produce a uniform, continuous and stable low frequency sound field environment under the driving force of an external electric signal so as to meet the required sound field condition on the measurement of different normal piezoelectric detectors or hydrophones receiving sensitivity particularity by low frequency, the utility model has practicability, and can specially meet the using requirement in field situations.