In the experiment shown below, the sound of the ringing bell is initially heard. As the air is gradually pumped out of the jar, the sound starts to become less loud and
![GOLD BELL SAMPLER-5 Bells-various Sizes for Craft Projects-sweet Melodic Ring Tone-make Wind Chimes, Dog Collar, Door Bells, Ornaments - Etsy GOLD BELL SAMPLER-5 Bells-various Sizes for Craft Projects-sweet Melodic Ring Tone-make Wind Chimes, Dog Collar, Door Bells, Ornaments - Etsy](https://i.etsystatic.com/6549987/r/il/eb5154/1847823643/il_570xN.1847823643_oiec.jpg)
GOLD BELL SAMPLER-5 Bells-various Sizes for Craft Projects-sweet Melodic Ring Tone-make Wind Chimes, Dog Collar, Door Bells, Ornaments - Etsy
![Amazon.com: Bevin Bells Ring for a Kiss Wedding Bell | Loud Cowbell, Tea Bell or Ornamental Bells | Party Bell | Wedding Reception & Rehearsal Dinner Bells | Countertop Service Call Bell Amazon.com: Bevin Bells Ring for a Kiss Wedding Bell | Loud Cowbell, Tea Bell or Ornamental Bells | Party Bell | Wedding Reception & Rehearsal Dinner Bells | Countertop Service Call Bell](https://m.media-amazon.com/images/I/61R+872OeJL.jpg)