Water-proof sound-transmitting member and method for producing same, and supported water-proof sound-transmitting member

A method for producing a water-proof sound-transmitting member including a water-proof sound-transmitting membrane to be attached to a housing having a hole that allows sound to pass through the hole, and a tab that is provided to the water-proof sound-transmitting membrane and is to be separated after the water-proof sound-transmitting membrane is attached to the housing and that has an overhanging portion overhanging beyond the water-proof sound-transmitting membrane, the method comprising the steps of:

• producing a laminate by laminating a first layer including a first adhesive layer for bonding the water-proof sound-transmitting membrane to the housing, a preliminary membrane body including the water-proof sound-transmitting membrane, a second layer including a second adhesive layer for adhering the tab to the water-proof sound-transmitting membrane, and a preliminary tab body including the tab in this order;
• inserting a blade into the laminate from the first layer toward the preliminary tab body to cut the first layer, the preliminary membrane body and the second layer so as to form respectively the first adhesive layer, the water-proof sound-transmitting membrane and the second adhesive layer, and providing, in a surface of the preliminary tab body on a side of the second layer, a notch that is aligned with end faces of the first adhesive layer, the water-proof sound-transmitting membrane and the second adhesive layer;
• and
• cutting the preliminary tab body to form the tab.