How to explain the name Echo Courts in The Crying of Lot 49

I've actually never heard of this book, but after researching for a bit I've been able to find you the following information. Be sure to double check its reliability.

"Pierce Inverarity’s testament serves to re-establish his presence, to enable him to communicate through time and space with his former mistress and eventually to reunite the two. It leads Oedipa to the motel Echo Courts. We know its denotation, the pining nymph Echo (Oedipa) in love with Narcissus(Pierce). But its connotation could also pertain to the echo of time. Later, when Oedipa is seduced by Metzger and becomes sensitised in her room at Echo Courts, the film shown on TV belongs to Metzger so to speak, but every intermission (the commercials) belongs to Pierce. He is present by proxy: the commercials and Metzger constitute this proxy and through them Pierce Inverarity constantly demands attention. His echo is communicated through time and space via his testament. As executor of his will Oedipa is guided around his huge estate San Narciso that includes the Scope bar, The Fangoso Lagoons with Lake Inverarity and the San Narciso Tank theatre, where she sees the play The Courier’s Tragedy that sparks off her strange search for the Trystero. The testament thus becomes Oedipa’s compass which she must use to navigate her way through Pierce’s world."