An acoustic piano usually has a protective wooden case surrounding the soundboard and metal strings, which are strung under great tension on a heavy metal frame. Pressing one or more keys on the piano's keyboard causes a padded hammer (typically padded with firm felt) to strike the strings. The hammer rebounds from the strings, and the strings continue to vibrate at their resonant frequency.
Dollars and Sense: The Cost of a Bad Hire. Hiring employees isn't cheap: On average, small business owners spend $1,872 to hire someone new, according to a study from the job search site Monster.
1 For example, a 30-day job posting costs $95 in Rhode Island, $195 in Atlanta and $295 in San Francisco.  Regional online recruitment firm NJJobShop.com maintains a resume database of job candidates from New Jersey that is free for employers to browse and contact through the site.