Financial ratios are relationships determined from a company's financial information and used for comparison purposes. Examples include such often referred to measures as return on investment (ROI), return on assets (ROA), and debt-to-equity, to name just three.
Tremolo harmonica. Tremolo harmonicas are a type of harmonica, distinct by having two reeds per note. In a tremolo harmonica the two reeds are tuned slightly off a reference pitch, one slightly sharp and the other slightly flat. This gives a unique wavering or warbling sound created by the two reeds being not exactly in tune with each other and difference in their subsequent waveforms acting against one another.
Other examples include xylophones and rattles. A plucked idiophone, such as a jewâs harp or a music box, is known as a lamellaphone. The names idiophone and membranophone (membrane instruments, such as drums) replace the looser term percussion instruments when a precise, acoustically based classification is required.