| 摘要 |
The corpus (1) contains a massive resonance unit and at least one hollow resonance unit. The massive resonance unit is made of the base board (2) and the resonance unit is made of at least one tone chamber (3). At least one tone chamber (3) is determined either with the inner plane of at least one sounding board (4, 5) and partly with the inner walls of the at least one opening (7) and/or at least one cut and/or at least one sink (9) made in the base board (2), or with the inner plane of at least one sounding board (4, 5), the inner plane of the rib and the inner walls of at least one opening (7) and/or at least one cut and/or at least one sink (9), made in the base board (2). In the place of mutual contact of at least one sounding board (4, 5) and the base board (2), the circumferential edge (10) of the inner plane of at least one sounding board (4, 5) is placed closer to the opposite wall of the corpus (1) than the circumferential edge (11, 13) of the opening (7) and/or the cut and/or the sink (9). Alternatively inside at least one tone chamber (3) there is placed the block, which can be a part of the base board (2). According to further alternatives oppositely to the circumferential edge (10) of the inner plane of the sounding board (4, 5) there is placed the recess made in the base board (2) or the profile (16) made inside the tone chamber (3), advantageously made in the slot, or there is made the recess (15) oppositely to the circumferential edge (13) of the sink (9) in the sounding board (4). According to further alternatives at least one of the sounding boards (4, 5) is attached to the base board (2) with a detachable joint, advantageously with screws or with screws and nuts. |
