Acoustic device and ear hook hearing aid device

An acoustic device for assisting a user in obtaining sounds arriving from a neighborhood along a target direction, comprising:

• an acoustic sensor module, comprising a plurality of acoustic sensors, configured to collect surrounding sound during operation and generate sensor signals, wherein the surrounding sound comprises an external sound from outside the acoustic device and an internal sound emitted from a position of a speaker module;
• the speaker module, configured to receive a drive signal during operation and output a speaker sound;
• and
• a signal processing circuit, communicatively connected to the acoustic sensor module and the speaker module, configured to perform, during operation, a target operation based on the sensor signals to generate the drive signal, such that the speaker sound satisfies a target sensitivity with respect to the surrounding sound, wherein
• the target sensitivity is that, within a preset auditory frequency range, a sensitivity distribution of the acoustic device to the external sound is directional and has a maximum value in the target direction, and a speaker sensitivity to the internal sound is less than 3 dB.