Silver dollar why can blow?

At ordinary times in the movie and TV that we are watching period of the Republic of China, always can see a such part, moneybags of a landlord is taking the whiff with fierce silver dollar, put to the side of ear next, show sly smile subsequently, this is to should examine the true and false of silver dollar, true silver dollar can give out euphonic echo, so this kind of method is in period of the Republic of China is commonly used the true bogus that will differentiate silver dollar, curious young associate may ask, why silver dollar can blow, how is this to return a responsibility?

Silver dollar can ring even if be helpful for vibration because of its physical attribute, when playing silver dollar, be equivalent to giving silver dollar brim a side force, and this force in silver dollar every part of identical radius can produce resonance, this kind of resonance can let sound last very long.

It is mix into so other metal silver dollar also can sound, but sound can have different, resembled adulterating sound of false silver dollar can become more cuting, the voice of false silver dollar of impure lead can become deeper, only the silver dollar of pure silver just can arise the sort of ringing and continuous and ceaseless buzzing song sound, the ring that so silver dollar blows also is not true certainly.

If eliminate too extreme condition, almost all object shakes in the generation below common environment, can sound.

Silver dollar is same also. Blow air with mouth, silver dollar generation shakes, can sound.

Silver-colored, iron, copper, nickel, aluminous, stone, it is pily ~~ is waited a moment even, the appearance of silver dollar of any material make it (although not be too regular form, can the head fills all sorts of opposite sexes) , generation shakes, can sound.

Just, because material is qualitative they will be different, or figure is different, content is not coequal element, cause differ tinnily.

For example, silver and iron money fall to go up, sound is different. Because material is qualitative,be reason. Silver and silver-colored ore fall to go up, sound is different. Because become lubricious matter,be. Silver and silver-colored cup fall to go up, sound is different, because,be appearance reason. The editor does not learn physics. What say possibly is not too rigorous.

Very may much person sufferred the effect of drama of movie and TV, feel OK to judge true and false through sound. Pass sound, can judge only at most tonal, judgement gives the quality of silver dollar.

Seasoned collector, can serve as reference through this sound. The silver dollar of different breed, the quantity that contain silver has distinction. Other ~~~ cannot be judged.

Special remind! Blow gas to let silver dollar phonate, cannot judge silver new old.

Somebody thinks now silver dollar can blow is true, not be actually, if want to discern the true bogus of silver dollar, still need a very complex course, quality of dimension of the check weight that basically see true and false or sees silver dollar, quantity, examine, hear voice, see the tine side grain act the role ofing, examine, knowledge include the oar, range that feel money.

Differentiate silver dollar to need much experience not only, and also be one of very main reasons to the familiar degree of silver dollar, according to expert introduction, the silver dollar that production of every dynasty place comes out somewhat difference, the quantity that contain silver is not unified, because cast a factory to be able to consider a few aeriform losses when casting silver dollar, and also meet in casting a process hard to avoid can encounter a few losses, so every period casts the silver dollar that come out, argentiferous quantity is different, if everybody wants to discern the true bogus of silver dollar, must examine each dynasty so the record to silver dollar, every dynasty produced how many silver dollar is to be able to inquire.

Not be every dynasty contains silver-colored quantity to having different difference to silver dollar only actually, connect the decorative pattern size of different dynasty silver dollar, still have weight, there also can are a few secret marks above silver dollar of course differ somewhat, want to discern so the true bogus of silver dollar, not be to rely on those who come out to blow noise to be able to listen only, need more respect however discern, ability decides truly silver dollar is really false.

If how individual eyesight does not quite? Pass key point of the palm on line of expert of APP of region ancient bronze mirror, true and false of relaxed appraisal coin.