A gain controller (205) controls the gain of the audio drive circuit (203) for the audio signal in response to the ambient sound level, the attenuated ambient sound level and the signal level.
The measure value is compared to a predetermined volume that reflects the ambient sound level.
A third circuit (211) determines an attenuated ambient sound level for the user from the microphone signal and an ambient sound attenuation of the earphone (105).
The dynamic and automated gain control may be used to reduce the risk of hearing damage e.g. by automatically restricting the sound level experienced by the user to the ambient sound level.
When the telephone receives a call indication from the system, it samples the ambient sound level through the telephone's microphone.
The signal comprises information for adjusting the sound level of the portable electronic device according to the obtained environmental sound level measurement.
The level of the alarm signal is increased as the ambient (or background) sound level rises.
A system and method (130) for automatically adjusting the sound volume of a gaming machine (100) based on the ambient noise level (810) to an appropriate level.
The driver-perceived ambient noise level due to the wind or other sources of noise must be at least 10 dB(A) below the noise level of the tractor
The method comprises obtaining a measurement of the environmental sound level surrounding the portable hands free device.
Speak clearly without pausing between words and at a level appropriate to the ambient noise level.
In a moving car, the noise level is approximately 70 dB.
Study on the impact of ambient noise on the measurements of CAPA system (PDF)
The testing was done in a stairwell with an ambient noise level of 33dBA.
The hi-fi soundscape is one in which discrete sounds can be heard clearly because of the low ambient noise level.
The hi-fi soundscape is one in which discrete sounds can be heard clearly because of the low ambient noise level.
In comparison, the ambient sound in a quiet room amounts to 40 dB(A) on average.
Where the ambient noise level of the environment is above 45 dB SPL, a volume gain of at least 20 dB above the ambient level must be user selectable.
Where the ambient noise level of the environment is above 45 dB SPL, a volume gain of at least 20 dB above the ambient level shall be user selectable.
Where ambient noise level is above 45 dB, volume gain of at least 20 dB above the ambient level must be user selectable.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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