Dynamic Acoustical Management in Information Handling Systems
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Solution Overview
Problem
Information handling systems face challenges in managing acoustics due to the increased power consumption and thermal energy generation, leading to high cooling fan speeds that result in excessive noise, especially when components are under heavy processing loads and housed in compact spaces with high airflow impedance.
Innovation Solution
A system and method that dynamically adjust power dissipation as a function of fan speed and thermal conditions, using an acoustics manager to cap cooling fan speeds and reduce CPU power dissipation, ensuring minimum performance while maintaining thermal parameters, and adjusting these settings based on ambient temperatures and user proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling fan speed is increased to maintain thermal parameters under heavy processing loads, then thermal management is improved, but acoustical noise increases
Solution Approach 1:
The system dynamically adjusts CPU power dissipation based on real-time thermal conditions and fan speed, rather than using static power management. The acoustics manager continuously monitors thermal parameters and adjusts power dissipation to maintain thermal safety while minimizing fan speed and associated noise, adapting to changing operating conditions.
Solution Approach 2:
The system changes the power dissipation parameter of the CPU as a function of fan speed and thermal conditions. By adjusting this parameter dynamically, the system can reduce thermal generation at the source, allowing lower fan speeds and reduced acoustical noise while maintaining thermal parameters within safe limits.
2Object-generated harmful factors
If CPU power dissipation is reduced to lower acoustical noise, then acoustical targets are achieved, but processing performance may be impacted
Solution Approach 1:
The acoustics manager implements a feedback control system that continuously monitors thermal parameters and adjusts CPU power dissipation accordingly. This feedback mechanism ensures that power is reduced only when thermal conditions permit, maintaining processing performance when possible while achieving acoustical targets when thermal conditions allow.
Solution Approach 2:
The system takes preliminary action by proactively managing power dissipation to prevent thermal conditions from requiring high fan speeds. By anticipating thermal buildup and adjusting power accordingly, the system maintains both performance and acoustical comfort without reactive throttling.
3Volume of stationary object
If housing size is reduced to improve portability, then compactness is improved, but airflow impedance increases making cooling more difficult
Solution Approach 1:
The system replaces reliance on mechanical cooling airflow with a thermal management approach based on power dissipation control. Instead of depending on high-velocity airflow through compact housing, the system manages heat at the source by dynamically adjusting CPU power, effectively substituting thermal control for mechanical cooling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces acoustics in information handling systems by balancing acoustic, reliability, and performance expectations, minimizing excessive thermal conditions and performance impacts, with minor power reductions having minimal impact on processing performance.
Implementation Method 1
a cooling fan generates a cooling airflow to maintain a thermal parameter within a housing
Implementation Method 2
The processor consumes electrical power and creates thermal energy as a byproduct of processing information
Data Source
AI summary
Acoustics management at an information handling system provides reduced acoustic noise with limited performance impact by dynamically changing power dissipation as a function of cooling fan speed and ambient temperature so that preemptive power restrictions prevent excessive thermal conditions that lead to excessive cooling fan speeds and associated acoustics. A maximum cooling fan speed of less than an available maximum is set and maintained by reducing power dissipation unless power dissipation reaches a minimum, after which the minimum power dissipation is maintained and cooling fan speed is allowed to increase.