In a noisy gathering, everyone raises their own voice in order to be heard better, which again leads to a higher ambient noise level. This unconscious raising of the voice in a noisy environment is called the Lombard effect, which is a common phenomenon in restaurant acoustics. In quiet surroundings, the vocal effort is not influenced by the ambient noise, but if the noise level exceeds 45 dB it starts to influence the speech level. We were invited by Galeria Mexicana de Diseño to help them out with the Acoustics of restaurante el Lago in Mexico City.