Waterproof vibration transducer module

A waterproof vibration transducer module comprising:

• a substrate which includes a through hole, a protrusion portion provided on one surface so as to surround the through hole, and a vibration conversion die mounted on the other surface so as to close the through hole;
• a holder which includes a hole and a rib being on a position surrounding the hole;
• a barrier diaphragm which is on a position overlapping with the through hole and the hole when viewed in a stacking direction, is clamped by the protrusion portion and the rib, and vibrates in a space formed by the hole and the protrusion portion;
• a first case in which a sound hole is formed;
• and
• a second case which is combined with the first case, wherein
• the substrate, the holder, and the barrier diaphragm are accommodated in an internal space formed by combining the first case and the second case with each other, the internal space is partitioned into two spaces by the holder and the barrier diaphragm, and one of the two spaces on a second case side is sealed.