Title:
オーディオシステムにおける小型ダイナミックトランスデューサの信号強度情報依存制御
Document Type and Number:
Japanese Patent JP4177328
Kind Code:
B2
Abstract:
A control circuit for a signal strength information dependent frequency response adaptation of an audio signal for an electrodynamic transducer (4), with a signal strength information determination means (2, 6) for determining a signal strength information according to the level of the audio signal, and a modifying means (3) for frequency selectively modifying the audio signal in response to the signal strength information such, that the electrodynamic transducer (4) converts the audio signal into a low distortion sound signal for high levels of an audio signal and with a flat frequency response for low levels of an audio signal, whereby a lower frequency range of the audio signal is modified with a gain different to a gain of a higher frequency range of the audio signal and a frequency separating the lower frequency range from the higher frequency range is shifted towards higher values for an increasing level of the audio signal and towards lower values for a decreasing level of the audio signal. The present invention further proposes a mobile telecommunication terminal with an accordingly designed control circuit.
Inventors:
Lechner, Thomas
Application Number:
JP2004526675A
Publication Date:
November 05, 2008
Filing Date:
May 28, 2003
Export Citation:
Assignee:
Sony Ericsson Mobile Communications, AB
International Classes:
H04R3/04; G10L21/003; H03G9/02; H04R3/00; H04R25/00
Domestic Patent References:
| JP3086699U | ||||
| JP6189389A | ||||
| JP63102493A | ||||
| JP58090897A | ||||
| JP61010304A | ||||
| JP2000287294A | ||||
| JP1093815U |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura