Sounding System Pulse Array Channel Impulse Response
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Solution Overview
Problem
Conventional speaker systems face challenges in producing high-fidelity sound across the full range of human audible frequencies due to the need for multiple drivers and enclosures, which increases size and cost, and also suffer from delayed user experience due to separate channel probing and transmission phases.
Innovation Solution
A sounding system that integrates a sound producing device and a sounding circuit, capable of generating a pulse array corresponding to an input audio signal, which includes a sensor, filtering circuit, and spike detection circuit to perform filtering and spike detection operations, allowing for concurrent sound production and channel impulse response generation, thus eliminating the need for separate channel probing phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple drivers (tweeter, mid-range driver, woofer) are incorporated to cover full audible frequency range, then sound quality is improved, but device complexity and volume increase
Solution Approach 1:
The patent employs a single speaker driver that performs multiple functions by sequentially operating in different modes: during the first time period it produces sound waves for audio reproduction, and during the second time period it generates probe signals for channel impulse response measurement. This multi-functional approach eliminates the need for separate tweeters, mid-range drivers, and woofers while maintaining full audible frequency coverage.
Solution Approach 2:
The patent implements periodic action by dividing the operation into distinct time periods: a first time period for sound wave production and a second time period for probe signal generation. The speaker driver alternates between these modes periodically, allowing channel sounding to occur during intervals when audio reproduction is not occurring, thus eliminating the need for dedicated sounding hardware.
2Measurement precision
If separate channel probing phase is implemented to obtain channel impulse response, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent implements periodic action by dividing the operation into distinct time periods: a first time period for sound wave production and a second time period for probe signal generation. The speaker driver alternates between these modes periodically, allowing channel sounding to occur during intervals when audio reproduction is not occurring, thus eliminating the need for dedicated sounding hardware.
Solution Approach 2:
The patent achieves continuity of useful action by integrating channel impulse response measurement into the overall system operation without requiring a separate dedicated phase. The probe signal generation occurs during the second time period of each cycle, continuously updating channel characteristics while maintaining audio reproduction during the first time period, thereby eliminating user experience delay.
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
Enables efficient sound production across the full audible frequency range without the need for multiple drivers, reduces system size and cost, and allows for immediate audio content delivery to the listener by performing sounding operations concurrently with sound production.
Implementation Method 1
The physics of sound wave propagation teaches that, within the human audible frequency range, the sound pressures generated by accelerating a membrane of a conventional speaker driver may be expressed as P ∝ SF · AR
Data Source
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AI summary
A sounding system is provided. The sounding system (11) includes a sound producing device (120), disposed at a sound producing location, receiving a sounding sequence, configured to produce a sounding pulse array according to the sounding sequence; and a sounding circuit (14), comprising a sensor (140), disposed at a sound constructing location, receiving a received sounding pulse array corresponding to the sounding pulse array; a filtering circuit (142), configured to perform a filtering operation on the received sounding pulse array according to the sounding sequence and the sounding pulse waveform, and generate an overall filtering result; and a spike detection circuit (144), configured to perform a spike detection operation on the overall filtering result and obtain a channel impulse response corresponding to a channel between the sound producing location and the sound constructing location.