The atmospheric velocity field excited by turbulence is studied for frequencies near the critical frequency of an atmosphere. The atmosphere is assumed to be isothermal, convectively neutral, and unbounded. In the solar atmosphere the power spectrum of the velocity correlation of the acoustic field can have a local peak for frequencies near the critical frequency of the atmosphere. With the help of a model of the solar convection zone, it is found that the intensity of the acoustic field near the peak agrees with that of the observed oscillatory motion. In addition, the acoustic field excited consists mainly of a vertical component, in agreement with observations.