Acoustic and vibration information accumulation mechanism, acoustic and vibration sensing system, and computer program

A sound and vibration information collecting mechanism, which collects low-frequency sound and vibration information with a predetermined frequency or lower from a detection target, the mechanism comprising:

• a resonance layer, which includes a natural oscillator having a natural frequency within a frequency band of the sound and vibration information being a collection target, and generates a resonance carrier by the natural oscillator emphasizing the sound and vibration information;
• a sensor, which detects the resonance carrier,
• wherein the sound and vibration information is a biosignal, the biosignal is sound and vibration information of a cardio-vascular system, and the natural frequency of the natural oscillator is within a frequency band including a frequency of first heart sound or a second heart sound included in the sound and vibration information of the cardio-vascular system;
• a first layer, which is disposed on a back side of a trunk of a living body and to which the sound and vibration information of the cardio-vascular system propagates;
• and
• a second layer, which includes:
• a casing for resonance having an arrangement space formed as a hole portion or a groove portion where to arrange the natural oscillator and the sensor, and
• a film covering the arrangement space, and which functions as the resonance layer,
• wherein the second layer side is supported by a support layer, which is provided in a body support means to damp externally inputted sound and vibration, and
• wherein a cutoff frequency as a mechanical filter of the second layer is set twice as high as a frequency of the biosignal being the collection target or higher.