Abstract: This application discloses an apparatus. The apparatus includes a housing, a transducer, a first valve, and a control circuit. The housing has an inner cavity and an opening, the transducer is installed in the inner cavity of the housing, and the first valve is fastened to the housing and covers the opening of the housing. The control circuit is electrically connected to the transducer and the first valve, the control circuit is configured to generate a first control signal and a second control signal, the first control signal is configured to drive the transducer to vibrate, and the second control signal is configured to control a switch on/off state of the first valve, so that the sound generating apparatus emits a plurality of air pulses to form audible sound, where a frequency of the audible sound is lower than a vibration frequency of the transducer.

Abstract: The present invention discloses an intravenous cytomegalovirus human immune globulin and a manufacturing method thereof, wherein the technical problem to be solved is to improve the purity, yield, and safety of the product. The intravenous cytomegalovirus human immune globulin of the present invention has a specific activity of no less than 2.5 PEI-U/mg, an anti-CMV titer of no less than 100 PEI-U/ml, a purity of greater than 98.2%, and a protein content of 51˜55 mg/ml.