Activity monitoring and directing system

1. An apparatus for enhancing the experience of a swimmer in the water comprising:

a sensor; said sensor for providing an output; and

an audio headset for a swimmer in the water; said audio headset for a swimmer in the water for receiving a stream of content; said audio headset for a swimmer in the water also for receiving said output from said sensor; said audio headset also including automatic gain control;

said audio headset for a swimmer in the water including a computing device; said computing device including a processor and a non-volatile memory;

said computing device also for converting said output from said sensor to audio information;

said audio headset for a swimmer in the water, being worn by said swimmer, for providing a combination of said stream of content and audio information to said swimmer;

a system communication module;

said system communication module for sending signals with said audio headset;

said system communication module also for sending interrupt audio messages to a swimmer in the water;

said system communication module also for delivering multiple audio streams to said audio headset;

said system communication module also for tracking stroke and body orientation changes of a swimmer in the water;

said system communication module also for logging output from said sensor for evaluation in real time by a coach;

said plurality of signals including a plurality of content channels in a frequency band that generally spans 100 to 250 KHz;

said system communication module also for combining a plurality of ultrasonic communication links used generally simultaneously in the same swimming pool by a plurality of coaches;

said system communication module also for enabling a coach to provide voice commands using a first content channel; said voice commands being conveyed through a first amplifier and a first low pass filter; said voice commands being modulated at a specific frequency using a modulator to produce a first unspread audio channel;

said system communication module for producing a second content channel that is conveyed through a second amplifier a second low pass filter; said second content stream being modulated at a specific frequency using a modulator to produce a second unspread audio channel;

said system communication module also for summing said plurality of content channels to produce a combined signal; said plurality of content channels being summed by a signal adder, and then added to a pilot frequency;

said system communication module also for multiplying said combined signal by a pseudorandom number code, which produces spread spectrum signal;

said system communication module also for adding an unspread pilot frequency signal to said combined signal to ease the process of signal tracking at said audio headset;

said system communication module also for increasing the level of the combined signal using a third amplifier to produce a transmission signal before being transmitted to said headset via an omnidirectional hydrophone;

said audio headset for receiving said transmission signal;

said audio headset also for splitting said transmission signal into a plurality of channels that may be used by said swimmer;

said sensor including a magnetometer for lap counting;

said sensor further including

a plurality of magnetic sensors arranged in a mutually orthogonal configuration;

a plurality of acceleration sensors in a mutually orthogonal configuration;

said plurality of magnetic sensors and said plurality of acceleration sensors being used to count laps and to determine speed;

said audio headset for receiving ultrasonic signals through water;

said ultrasonic signal being propagated as a composite signal multiplied by a PN code to form a spread spectrum signal which mitigates multipath distortion;

said ultrasonic signal including a pilot signal; said pilot signal being used to facilitate code and carrier acquisition in said headset to compensate for Doppler shift due to the motion of said swimmer;

said ultrasonic signal being transmitted by said omnidirectional hydrophone with a wide radiation pattern to cover the pool underwater as uniformly as possible;

a web portal:

said system communication module also for distributing workouts through said web portal;

said web portal for providing a connection to performance data for workouts and swim meet results.

2. An apparatus as recited in claim 1 , in which said sensor is configured to supply real-time information.

3. An apparatus as recited in claim 1 , in which said sensor includes a radio for emitting a wireless output that may be received by said audio headset.

4. An apparatus as recited in claim 1 , in which said sensor is a swimmer's lap counter.

5. An apparatus as recited in claim 1 , in which said sensor is a heart rate monitor.

6. An apparatus as recited in claim 1 , in which said sensor is a respiration monitor.

7. An apparatus as recited in claim 1 , in which said sensor is a swimmer's stroke counter.

8. An apparatus as recited in claim 1 , in which said sensor measures a swimmer's speed.

9. An apparatus as recited in claim 1 , in which said sensor records a swimmer's lap time.

10. An apparatus as recited in claim 1 , in which said memory in said processor stores a plurality of pre-recorded voice messages which are conveyed to said audio headset based on a signal received from said sensor.

11. An apparatus as recited in claim 1 , in which said audio headset includes a radio for receiving said stream of content.

12. An apparatus as recited in claim 1 , in which said audio headset includes a radio for receiving said output of said sensor.

13. An apparatus as recited in claim 1 , further comprising:

a systems communication hub; said systems communication hub including a processor and a non-volatile memory;

said systems communication hub including a radio for providing wireless communications to said audio headset;

said systems communication hub for providing information to said swimmer from another person.

14. An apparatus as recited in claim 11 , further comprising:

a microphone; said microphone being attached to said audio headset;

said microphone for receiving ambient sound and for enabling a first person to send voice information using said radio to another person.

15. An apparatus as recited in claim 1 , in which said stream of content includes entertainment.

16. An apparatus as recited in claim 1 , further comprising:

a remote transceiver; said remote transceiver including a processor and a non-volatile memory and a radio.

17. An apparatus as recited in claim 16 , in which said remote transceiver is a smart phone.

18. An apparatus as recited in claim 16 , in which said remote transceiver is a tablet.

19. An apparatus as recited in claim 16 , in which said remote transceiver is used by a coach for communicating with said swimmer wearing said audio headset.

20. An apparatus as recited in claim 1 , further comprising:

a remote server;

said remote server including a processor and a non-volatile memory;

said non-volatile memory including a web portal software program;

said web portal software program for conveying information received from said audio headset to other persons who connect to said remote server.

21. An apparatus as recited in claim 20 , in which data from said sensor is archived on said remote server.

22. An apparatus as recited in claim 20 , in which data from said sensor is retrieved from said remote server.

23. An apparatus as recited in claim 1 , in which said sensor includes an accelerometer for performance measurement.