Most good online dictionaries, such as the OxfordDictionaries.com and Merriam-Webster.com, use audio pronunciation guides for their entries. Other resources that offer audio pronunciations include HowJSay.com and Forvo.com. Some sites also feature several variations of words to account for different accents.
When browsing the Oxford Dictionaries or Merriam-Webster websites, audio pronunciation guides can be accessed by clicking on the audio icon included with any entry in the dictionary. This icon typically appears either next to the word or after the pronunciation key text that is located beneath the dictionary definition. Provided the required plug-ins are installed, the audio for the word selected will play through the computer's speakers.