AUDIO AMPLIFICATION SYSTEM

• US 20080144844A1
• Filed: 12/18/2007
• Published: 06/19/2008
• Est. Priority Date: 12/18/2006
• Status: Active Grant

• Current Assignee: The Sapling Company, Inc.
• Original Assignee: Sapling Company, Incorporated
• Inventors: SHEMESH, Ilan, ROSEMAN, Ido
• Granted Patent: US 8,144,892 B2
• Time in Patent Office: Days
• US Class Current: 381/57
• CPC Class Codes: H04R 27/00 Public address systems circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; monitoring or testing arrangements for public address systems H04R29/007; amplifiers H03F

Abstract

A wireless audio amplification system for classrooms and the like includes a system that allows for advanced listening and learning audio tools. The invention combines radio frequency and infrared technologies into one integrated system. A microphone includes a radio frequency receiver and an infrared transceiver. The microphone transmits voice signals to an audio amplifier unit that includes a radio frequency transceiver and an infrared transceiver.

Claims

1. An audio amplification system comprising:

(a) an audio amplifier including a microprocessor, a radio frequency transceiver, an infrared transceiver, an antenna, amplification electronics and at least one speaker;

(b) a wireless microphone including a microphone head, a radio frequency transceiver, an infrared receiver, a microprocessor and an antenna;

whereby

(c) the audio amplifier is configured to transmit infrared signals to the microphone containing a channel code representative of a particular transmission channel, and the microphone unit is arranged to transmit radio frequency signals representative of audio signals to the audio amplifier over the particular transmission channel.

2. The system of claim 1, in which the channel code is periodically transmitted in a frequency-hopping manner from the amplifier to the microphone.

3. The system of claim 1, in which the microphone is configured in a gooseneck fashion, such that the microphone head is removable from a microphone portion containing the radio frequency transceiver and the infrared receiver.