Wireless Microphone Frequency Assignment via Intermodulation Calculation

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Solution Overview

Problem

Conventional methods for frequency assignment in wireless microphone systems are time-consuming and inefficient, and cannot dynamically adapt to intermodulation problems that may occur during performances, leading to potential audio interference issues.

Innovation Solution

A system and method that utilize a smart controller module and a cloud server to perform intermodulation calculations and dynamically assign intermodulation-free frequencies, allowing for real-time validation and backup frequency sharing between microphone devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual intermodulation calculations are performed by sound engineers, then frequency assignments can be determined, but the process is time-consuming and inefficient

Engineering Contradiction:
Improvefrequency assignment accuracyVSAvoidtime for frequency assignment
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical calculation methods with an automated electronic system that performs intermodulation calculations using a server and communication interface. The system automatically computes intermodulation products and determines safe frequency assignments without requiring manual mathematical calculations by sound engineers.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service by allowing the frequency assignment process to be performed automatically by the technical system itself. The server-based calculation engine autonomously determines frequency assignments based on input parameters, eliminating the need for continuous human intervention in the calculation process.

Inventive Principle:
Principle #25Self-service

2Adaptability or versatility

If static frequency assignments are used, then setup is simplified, but the system cannot dynamically adapt to intermodulation problems that occur during performance

Engineering Contradiction:
Improvedynamic adaptation to intermodulationVSAvoidfrequency management system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where the system continuously monitors for intermodulation problems during performance and can dynamically recalculate and reassign frequencies. The server receives real-time data about audio quality and intermodulation issues, processes this information, and provides updated frequency assignments to resolve detected problems.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system transitions from static frequency assignments to dynamic frequency management. The frequency assignment is no longer fixed but can be adjusted in real-time based on changing conditions during performance, allowing the system to adapt to emerging intermodulation issues while maintaining operational simplicity through automated control.

Inventive Principle:
Principle #15Dynamics

3Productivity

If cloud-based validation is implemented, then frequency validation is automated and efficient, but network dependency is introduced

Engineering Contradiction:
Improvefrequency validation speedVSAvoidsystem operation reliability
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent introduces a server as an intermediary between the frequency assignment system and the validation process. The server acts as a centralized computational resource that performs complex intermodulation calculations and provides validation services to multiple clients, enabling automated frequency validation while distributing the computational burden and maintaining system reliability through networked redundancy.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11197087B2Frequency assignments for wireless microphone systems
Publication Date: 2021.12.07 HARMAN INT IND INC
  • US11197087B2 patent drawing
  • US11197087B2 patent drawing
  • US11197087B2 patent drawing

AI summary

A system and method for determining assigned frequencies for wireless microphone systems (WMSs) at a venue. Each WMS comprises a transmitter and a receiver. Each transmitter may comprise an IoT device connected to the transmitters and a server via a network. A first input for requesting the assigned frequencies is received at a transmitter which sends the request to the server via the network. The server determines intermodulation free frequencies based on chained stages and predefined data describing the WMSs at the venue and transmits the intermodulation free frequencies to one or more transmitters at the venue. Each WMS receives an intermodulation free frequency as an assigned frequency. A second input for requesting validation of an assigned frequency is received at a transmitter which sends the request to the server. The server determines and sends a validation status of the assigned frequency to the transmitter which displays the validation status.