The purpose of a radio advertisement is to advertise your film to a mass audience. It offers a unique and creative opportunity to build an atmosphere and fully engage an audience without giving away the story line.
However, if we were to distribute our film using this method we would struggle to have a budget big enough as we are an independent company. On the other hand, we could put a radio advertisement on a local radio station, aimed towards teenage females, our target audience. Local radio stations have loyal listeners and are more likely to warm to film even if it is not something they would normally want to watch but because it will be played multiple times in the day, they may be more willing to watch it.
Radio advertisers use voice overs to sell a product because it tells the audience to go and watch the product as it can convey emotion and authority.
Radio advertisement example:
The Planet of the Apes, 1968 and 1970
The Rise of the Planet of the Apes radio advertisement are very similar to each other. They both include some sound effects from the film but it is mainly a voice speaking about the film and telling you a brief outline of the story. However this is a very old radio advertisement and therefore may be outdated and have developed.
Breakfast at Tiffany's, 1961
The radio advertisement for Breakfast at Tiffany's is also very old and it uses a similar technique of a person talking about the film in order to persuade you to watch it. However in this advertisement the man telling the audience about the film also makes a comment to which the main character replies to by using content of the film.
Nightbeasts, 2013
This radio advertisement is much more recent than Breakfast at Tiffany's and The Rise of the Planet of the Apes and uses a different technique than the older advertisements. For example, Nightbeasts uses content from the film throughout the advertisement such as characters talking, sound guns being fired and the noise of an animal whereas the older advertisements mainly have someone talking about the film. The Breakfast at Tiffany's advertisement uses a voiceover of a man who tells the audience about the film and occasionally content from the film is used. However, it doesn't give you as much information about the film as Nightbeasts because it is a person telling you about the film and it doesn't introduce all the characters. Moreover, because the Nightbeasts advert uses content from the film it makes the audience more interested in the film because they know slightly more of who is involved.