The present invention describes a container which is capable of creating a sound through the displacement of air within a channel and sound ports in the container.

The present invention describes a container which is capable of creating a sound through the displacement of air within a channel and sound ports in the container.

A controller configured to control a sound producing module includes a volume controlling unit configured to determine a demodulation amplitude and a modulation amplitude corresponding to a target volume. The sound producing module comprises a driving circuit and an air-pulse generating device. The driving circuit generates a demodulation driving signal according to the demodulation amplitude and generates a modulation driving signal according to the modulation amplitude, so as to drive the air-pulse generating device. The air-pulse generating device produces sound via generating a plurality of air pulses at an ultrasonic pulse rate.

A calibration method comprises adjusting an operating frequency of an air-pulse generating device, such that a sound pressure level (SPL) of the air-pulse generating device is within a specific range. The sound producing module comprises the air-pulse generating device configured to produce sound via generating a plurality of air pulses at a pulse rate corresponding to the operating frequency.

A calibration method comprises adjusting an operating frequency of an air-pulse generating device, such that a sound pressure level (SPL) of the air-pulse generating device is within a specific range. The sound producing module comprises the air-pulse generating device configured to produce sound via generating a plurality of air pulses at a pulse rate corresponding to the operating frequency.

Example methods, apparatuses, and/or articles of manufacture related to wild game calling are disclosed that may be implemented, in whole or in part, using a game calling device. In a particular implementation, a game calling device may closely imitate the call of an elk while air is passed over a reed to make a game call sound.

Example methods, apparatuses, and/or articles of manufacture related to wild game calling are disclosed that may be implemented, in whole or in part, using a game calling device. In a particular implementation, a game calling device may closely imitate the call of an elk while air is passed over a reed to make a game call sound.