Felipe Garcia

Mexico City urban noise control network.

This paper presents an IP network model for monitoring urban noise emitted from mobile and fixed sources. The model is applying to build a monitoring network in the historic center of Mexico City. Design of network system includes measuring station design, network design, central of monitoring design, measuring politics and functionality, event detection modules, central database of historic information, report module design, and administration system. Mexico City Urban Noise Control Network is going to be an important tool to enforce application of local noise regulations, detection of infractions for excessive noise, detection of security events like gun shots, and monitoring of noise pollution levels. Measuring stations are developed to detect average standard levels and individual events, to generate warnings and alarms, and to detect some specific events. Network is developed over a wireless Network.

Speaker recognition infrastructure for legal context in Mexico City.

Speaker recognition is actually a mature technology; it is part of the alternatives considered highly reliable for biometric identification, control access of computer services, and so on. However, applications to legal ambient, particularly as part of juridical processes, are still problematic, particularly in an ambient like Mexico City. High‐quality infrastructure to determine with high precision whether a voice recording comes from a specific person is a topic which has to be regulated. Expert studies of this kind have to be regulated. This paper is to fulfill the need to develop a local regulation of infrastructure characteristics and standard test methods for this topic. Standard test has to take into account local language mainly.

Noise pollution problem in Mexico City.

Noise pollution in Mexico City is not a solved problem yet. In 1976 a national regulation was issued to prevent and reduce noise emitted by fixed and mobile sources, but it has not been implemented. This paper analyzes the reasons why noise pollution for Mexico citizen’s welfare is not the main concern, why regulations have not been applied, and what are the results of absence of attention to this problem. The impact of Mexico City Airport, main roads, and construction practices are unknown and has to be studied and reflected in regulations and government policies. Recommendations of this paper include these main aspects of the problem.

Acoustics pattern code to represent the contour of any visual image for people who are blind.

In the search for rehabilitation for people who are partially blind through non‐invasive means, an option is by the use of the ear. This paper proposes a conceptual prosthesis model called Acoustics‐viewer. The idea is to generate acoustic patterns from contours representing optical images, from frequencies in the range of three octaves from a piano sound source.

Underwater high energy acoustic communications device

An underwater high energy acoustic communications device has inner shell-like structure having an outer surface connected to first ends of tuning springs and outer shell-like structure having an inner surface connected to second ends of the tuning springs to concentrically locate and space the inner and outer structures apart. Explosive units mounted on the inner surface of the outer structure each includes an explosive squib, rigid tube, and projectile. A micro-controller feeds firing signals over electrical leads to the explosive units to detonate them and fire their projectiles to strike the inner structure that emits ringing high-energy broadband acoustic signals that are propagated into surrounding seawater. A transducer connected to the micro controller receives acoustic signals from a remote source to activate the micro-controller to generates preprogrammed sequences of firing signals to propagate coded messages by the high-energy broadband, acoustic signals.