Unfortunately, at the individual level there are no boilerplate solutions (or at the team/unit/org level). Generally speaking, businesses who have high employee turnover spend shitloads on recruiting and training to replace, not to mention time lost and opportunity costs, the blow to morale, etc.
Rationally speaking, these losses would be expected to curb behaviors that result in turnover, but they tend not to, at least not in the US. The work culture here is so focused on "efficiency" and minimizing costs that it tends to create tunnel vision, but since most other successful businesses also have tunnel vision, people tend not to see it as a problem.
Essentially, if you are in a conflict averse work environment, which is most organizations, then being heard is not as in the cards as one might hope. Part of the issue on that front is that people don't have the resilience or training to engage in conflict productively. That said, when conflict is engaged in productively, it's almost never recognized as conflict at all.
People often voice the need for greater training in conflict management but rarely engage in it, at least in part because many people are uncomfortable with it, which makes practice tough. Lack of practice leads to a lack of skill and—oh look! Here we are, back at square 1.
Where this knowledge can be useful for the lay-person, is in determining whether or not an organization might be a good fit to work in. To answer your question explicitly, you can't make yourself be heard unless the other party is willing to listen. When that occurs at work, it kind of depends on what you value.